21023121000112 has 160 divisors (see below), whose sum is σ = 52425787392000. Its totient is φ = 7925925945600.

The previous prime is 21023120999987. The next prime is 21023121000127. The reversal of 21023121000112 is 21100012132012.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 798161439 + ... + 798187777.

It is an arithmetic number, because the mean of its divisors is an integer number (327661171200).

Almost surely, 2^{21023121000112} is an apocalyptic number.

21023121000112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21023121000112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26212893696000).

21023121000112 is an abundant number, since it is smaller than the sum of its proper divisors (31402666391888).

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

21023121000112 is a wasteful number, since it uses less digits than its factorization.

21023121000112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47295 (or 47289 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21023121000112 its reverse (21100012132012), we get a palindrome (42123133132124).

The spelling of 21023121000112 in words is "twenty-one trillion, twenty-three billion, one hundred twenty-one million, one hundred twelve", and thus it is an aban number.