21112020011212 has 24 divisors (see below), whose sum is σ = 39788360587472. Its totient is φ = 9743930164800.

The previous prime is 21112020011111. The next prime is 21112020011219. The reversal of 21112020011212 is 21211002021112.

It is not an unprimeable number, because it can be changed into a prime (21112020011219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5084287 + ... + 8250697.

Almost surely, 2^{21112020011212} is an apocalyptic number.

It is an amenable number.

21112020011212 is a deficient number, since it is larger than the sum of its proper divisors (18676340576260).

21112020011212 is a wasteful number, since it uses less digits than its factorization.

21112020011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294649 (or 3294647 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21112020011212 its reverse (21211002021112), we get a palindrome (42323022032324).

The spelling of 21112020011212 in words is "twenty-one trillion, one hundred twelve billion, twenty million, eleven thousand, two hundred twelve".