21112020121112 has 64 divisors (see below), whose sum is σ = 42515833651200. Its totient is φ = 9792387924480.

The previous prime is 21112020121103. The next prime is 21112020121151. The reversal of 21112020121112 is 21112102021112.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34292339 + ... + 34902557.

It is an arithmetic number, because the mean of its divisors is an integer number (664309900800).

Almost surely, 2^{21112020121112} is an apocalyptic number.

It is an amenable number.

21112020121112 is an abundant number, since it is smaller than the sum of its proper divisors (21403813530088).

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

21112020121112 is a wasteful number, since it uses less digits than its factorization.

21112020121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613896 (or 613892 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112020121112 its reverse (21112102021112), we get a palindrome (42224122142224).

The spelling of 21112020121112 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one hundred twenty-one thousand, one hundred twelve".