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31211200511213 is a prime number
BaseRepresentation
bin1110001100010111011001…
…00001001111110011101101
311002111202120020010210101012
413012023230201033303231
513042331014312324323
6150214121053355005
76400635434022002
oct706135441176355
9132452506123335
1031211200511213
119a43661017a88
123600b33a98a65
131455285357488
1479c8b725b8a9
15391d1ce5e678
hex1c62ec84fced

31211200511213 has 2 divisors, whose sum is σ = 31211200511214. Its totient is φ = 31211200511212.

The previous prime is 31211200511149. The next prime is 31211200511251. The reversal of 31211200511213 is 31211500211213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21781467711844 + 9429732799369 = 4667062^2 + 3070787^2 .

It is a cyclic number.

It is not a de Polignac number, because 31211200511213 - 26 = 31211200511149 is a prime.

It is a super-3 number, since 3×312112005112133 (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31211200531213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605600255606 + 15605600255607.

It is an arithmetic number, because the mean of its divisors is an integer number (15605600255607).

Almost surely, 231211200511213 is an apocalyptic number.

It is an amenable number.

31211200511213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31211200511213 is an equidigital number, since it uses as much as digits as its factorization.

31211200511213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 31211200511213 its reverse (31211500211213), we get a palindrome (62422700722426).

The spelling of 31211200511213 in words is "thirty-one trillion, two hundred eleven billion, two hundred million, five hundred eleven thousand, two hundred thirteen".