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21202112311 is a prime number
BaseRepresentation
bin10011101111101111…
…101000111100110111
32000201121111220022221
4103233233220330313
5321410220043221
613423510503211
71350256660342
oct235757507467
960647456287
1021202112311
118aa0048876
124138664b07
131ccb75b6b3
141051c05459
15841572541
hex4efbe8f37

21202112311 has 2 divisors, whose sum is σ = 21202112312. Its totient is φ = 21202112310.

The previous prime is 21202112303. The next prime is 21202112339. The reversal of 21202112311 is 11321120212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21202112311 - 23 = 21202112303 is a prime.

It is a super-4 number, since 4×212021123114 (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202112341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601056155 + 10601056156.

It is an arithmetic number, because the mean of its divisors is an integer number (10601056156).

Almost surely, 221202112311 is an apocalyptic number.

21202112311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202112311 is an equidigital number, since it uses as much as digits as its factorization.

21202112311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21202112311 its reverse (11321120212), we get a palindrome (32523232523).

The spelling of 21202112311 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, three hundred eleven".