21020221012112 has 80 divisors (see below), whose sum is σ = 49026754944000. Its totient is φ = 8718063943680.

The previous prime is 21020221012097. The next prime is 21020221012157. The reversal of 21020221012112 is 21121012202012.

It is a super-3 number, since 3×21020221012112³ (a number of 41 digits) contains 333 as substring.

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, 61607537 + ... + 61947792.

It is an arithmetic number, because the mean of its divisors is an integer number (612834436800).

Almost surely, 2^{21020221012112} is an apocalyptic number.

It is an amenable number.

21020221012112 is an abundant number, since it is smaller than the sum of its proper divisors (28006533931888).

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

21020221012112 is a wasteful number, since it uses less digits than its factorization.

21020221012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123555389 (or 123555369 counting only the distinct ones).

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

Adding to 21020221012112 its reverse (21121012202012), we get a palindrome (42141233214124).

The spelling of 21020221012112 in words is "twenty-one trillion, twenty billion, two hundred twenty-one million, twelve thousand, one hundred twelve".