21311303220112 has 20 divisors (see below), whose sum is σ = 41292663918940. Its totient is φ = 10655131886208.

The previous prime is 21311303220101. The next prime is 21311303220127. The reversal of 21311303220112 is 21102230311312.

It can be written as a sum of positive squares in 2 ways, for example, as 1532683616256 + 19778619603856 = 1238016^2 + 4447316^2 .

It is a super-2 number, since 2×21311303220112² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32144343 + ... + 32800630.

It is an arithmetic number, because the mean of its divisors is an integer number (2064633195947).

Almost surely, 2^{21311303220112} is an apocalyptic number.

It is an amenable number.

21311303220112 is a deficient number, since it is larger than the sum of its proper divisors (19981360698828).

21311303220112 is a wasteful number, since it uses less digits than its factorization.

21311303220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64965490 (or 64965484 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21311303220112 its reverse (21102230311312), we get a palindrome (42413533531424).

The spelling of 21311303220112 in words is "twenty-one trillion, three hundred eleven billion, three hundred three million, two hundred twenty thousand, one hundred twelve".