21112123211310 has 64 divisors (see below), whose sum is σ = 52039440115200. Its totient is φ = 5477644351872.

The previous prime is 21112123211303. The next prime is 21112123211321. The reversal of 21112123211310 is 1311232121112.

It is a super-2 number, since 2×21112123211310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81410031 + ... + 81668949.

It is an arithmetic number, because the mean of its divisors is an integer number (813116251800).

Almost surely, 2^{21112123211310} is an apocalyptic number.

21112123211310 is an abundant number, since it is smaller than the sum of its proper divisors (30927316903890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112123211310 is a wasteful number, since it uses less digits than its factorization.

21112123211310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332425.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 21112123211310 its reverse (1311232121112), we get a palindrome (22423355332422).

The spelling of 21112123211310 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-three million, two hundred eleven thousand, three hundred ten".