20211021021212 has 24 divisors (see below), whose sum is σ = 40909054601856. Its totient is φ = 8557506317808.

The previous prime is 20211021021199. The next prime is 20211021021227. The reversal of 20211021021212 is 21212012011202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4348324058 + ... + 4348328705.

It is an arithmetic number, because the mean of its divisors is an integer number (1704543941744).

Almost surely, 2^{20211021021212} is an apocalyptic number.

It is an amenable number.

20211021021212 is an abundant number, since it is smaller than the sum of its proper divisors (20698033580644).

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

20211021021212 is a wasteful number, since it uses less digits than its factorization.

20211021021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8696652857 (or 8696652855 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20211021021212 its reverse (21212012011202), we get a palindrome (41423033032414).

The spelling of 20211021021212 in words is "twenty trillion, two hundred eleven billion, twenty-one million, twenty-one thousand, two hundred twelve".