21112020011012 has 72 divisors (see below), whose sum is σ = 44587230819264. Its totient is φ = 8567198725824.

The previous prime is 21112020010973. The next prime is 21112020011023. The reversal of 21112020011012 is 21011002021112.

21112020011012 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21112020011012² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18312278 + ... + 19430994.

It is an arithmetic number, because the mean of its divisors is an integer number (619267094712).

Almost surely, 2^{21112020011012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112020011012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22293615409632).

21112020011012 is an abundant number, since it is smaller than the sum of its proper divisors (23475210808252).

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

21112020011012 is a wasteful number, since it uses less digits than its factorization.

21112020011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120633 (or 1120612 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21112020011012 its reverse (21011002021112), we get a palindrome (42123022032124).

The spelling of 21112020011012 in words is "twenty-one trillion, one hundred twelve billion, twenty million, eleven thousand, twelve".