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21312122333333 = 13131110311345837
BaseRepresentation
bin1001101100010000111010…
…11110110010100010010101
32210110102022110010022000112
410312020131132302202111
510243134211304131313
6113154353121252405
74326515154600056
oct466103536624225
983412273108015
1021312122333333
1168774694a6727
122482522794105
13bb79559a5980
1453972578a72d
1526e59d1438a8
hex13621d7b2895

21312122333333 has 16 divisors (see below), whose sum is σ = 23147687920896. Its totient is φ = 19504853584320.

The previous prime is 21312122333287. The next prime is 21312122333371. The reversal of 21312122333333 is 33333322121312.

Adding to 21312122333333 its reverse (33333322121312), we get a palindrome (54645444454645).

It is a happy number.

It is not a de Polignac number, because 21312122333333 - 26 = 21312122333269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21312122333333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312122333933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3794510 + ... + 7551327.

It is an arithmetic number, because the mean of its divisors is an integer number (1446730495056).

Almost surely, 221312122333333 is an apocalyptic number.

It is an amenable number.

21312122333333 is a deficient number, since it is larger than the sum of its proper divisors (1835565587563).

21312122333333 is a wasteful number, since it uses less digits than its factorization.

21312122333333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11347084.

The product of its digits is 34992, while the sum is 32.

The spelling of 21312122333333 in words is "twenty-one trillion, three hundred twelve billion, one hundred twenty-two million, three hundred thirty-three thousand, three hundred thirty-three".