21022220101112 has 16 divisors (see below), whose sum is σ = 39417312765600. Its totient is φ = 10510936696960.

The previous prime is 21022220101027. The next prime is 21022220101153. The reversal of 21022220101112 is 21110102222012.

It is a congruent number.

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, 21153089 + ... + 22124592.

It is an arithmetic number, because the mean of its divisors is an integer number (2463582047850).

Almost surely, 2^{21022220101112} is an apocalyptic number.

It is an amenable number.

21022220101112 is a deficient number, since it is larger than the sum of its proper divisors (18395092664488).

21022220101112 is a wasteful number, since it uses less digits than its factorization.

21022220101112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43338406 (or 43338402 counting only the distinct ones).

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

Adding to 21022220101112 its reverse (21110102222012), we get a palindrome (42132322323124).

The spelling of 21022220101112 in words is "twenty-one trillion, twenty-two billion, two hundred twenty million, one hundred one thousand, one hundred twelve".