21011222020112 has 20 divisors (see below), whose sum is σ = 40816654925520. Its totient is φ = 10477891716768.

The previous prime is 21011222020027. The next prime is 21011222020141. The reversal of 21011222020112 is 21102022211012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1732449578 + ... + 1732461705.

It is an arithmetic number, because the mean of its divisors is an integer number (2040832746276).

Almost surely, 2^{21011222020112} is an apocalyptic number.

It is an amenable number.

21011222020112 is a deficient number, since it is larger than the sum of its proper divisors (19805432905408).

21011222020112 is a wasteful number, since it uses less digits than its factorization.

21011222020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3464911670 (or 3464911664 counting only the distinct ones).

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

Adding to 21011222020112 its reverse (21102022211012), we get a palindrome (42113244231124).

The spelling of 21011222020112 in words is "twenty-one trillion, eleven billion, two hundred twenty-two million, twenty thousand, one hundred twelve".