20210021021112 has 128 divisors (see below), whose sum is σ = 54580835400000. Its totient is φ = 6199135027200.

The previous prime is 20210021021111. The next prime is 20210021021129. The reversal of 20210021021112 is 21112012001202.

It is a junction number, because it is equal to n+sod(n) for n = 20210021021091 and 20210021021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210021021111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 495311112 + ... + 495351912.

Almost surely, 2^{20210021021112} 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 20210021021112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27290417700000).

20210021021112 is an abundant number, since it is smaller than the sum of its proper divisors (34370814378888).

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

20210021021112 is a wasteful number, since it uses less digits than its factorization.

20210021021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45721 (or 45717 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20210021021112 its reverse (21112012001202), we get a palindrome (41322033022314).

The spelling of 20210021021112 in words is "twenty trillion, two hundred ten billion, twenty-one million, twenty-one thousand, one hundred twelve".