21020112022 has 96 divisors (see below), whose sum is σ = 42096402432. Its totient is φ = 7784352576.

The previous prime is 21020112007. The next prime is 21020112031. The reversal of 21020112022 is 22021102012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 21020111993 and 21020112011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1369563 + ... + 1384825.

It is an arithmetic number, because the mean of its divisors is an integer number (438504192).

Almost surely, 2^21020112022 is an apocalyptic number.

21020112022 is an abundant number, since it is smaller than the sum of its proper divisors (21076290410).

21020112022 is a wasteful number, since it uses less digits than its factorization.

21020112022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15362 (or 15355 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21020112022 its reverse (22021102012), we get a palindrome (43041214034).

The spelling of 21020112022 in words is "twenty-one billion, twenty million, one hundred twelve thousand, twenty-two".