21112100310 has 96 divisors (see below), whose sum is σ = 58973412960. Its totient is φ = 4823013888.

The previous prime is 21112100309. The next prime is 21112100341. The reversal of 21112100310 is 1300121112.

It is a super-2 number, since 2×21112100310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4462026 + ... + 4466754.

It is an arithmetic number, because the mean of its divisors is an integer number (614306385).

Almost surely, 2^21112100310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112100310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29486706480).

21112100310 is an abundant number, since it is smaller than the sum of its proper divisors (37861312650).

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

21112100310 is a wasteful number, since it uses less digits than its factorization.

21112100310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7790 (or 7783 counting only the distinct ones).

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

Adding to 21112100310 its reverse (1300121112), we get a palindrome (22412221422).

The spelling of 21112100310 in words is "twenty-one billion, one hundred twelve million, one hundred thousand, three hundred ten".