21112011310 has 128 divisors (see below), whose sum is σ = 45519667200. Its totient is φ = 6977456640.

The previous prime is 21112011287. The next prime is 21112011317. The reversal of 21112011310 is 1311021112.

It is a happy number.

It is a super-2 number, since 2×21112011310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112011317) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3363475 + ... + 3369745.

It is an arithmetic number, because the mean of its divisors is an integer number (355622400).

Almost surely, 2^21112011310 is an apocalyptic number.

21112011310 is an abundant number, since it is smaller than the sum of its proper divisors (24407655890).

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

21112011310 is a wasteful number, since it uses less digits than its factorization.

21112011310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6386.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21112011310 its reverse (1311021112), we get a palindrome (22423032422).

The spelling of 21112011310 in words is "twenty-one billion, one hundred twelve million, eleven thousand, three hundred ten".