21020202212112 has 80 divisors (see below), whose sum is σ = 61807369700160. Its totient is φ = 6835838112000.

The previous prime is 21020202212083. The next prime is 21020202212117. The reversal of 21020202212112 is 21121220202012.

It is a happy number.

21020202212112 is a `hidden beast` number, since 210 + 2 + 0 + 20 + 221 + 211 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21020202212117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 593371014 + ... + 593406437.

It is an arithmetic number, because the mean of its divisors is an integer number (772592121252).

Almost surely, 2^{21020202212112} is an apocalyptic number.

It is an amenable number.

21020202212112 is an abundant number, since it is smaller than the sum of its proper divisors (40787167488048).

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

21020202212112 is a wasteful number, since it uses less digits than its factorization.

21020202212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186777509 (or 1186777497 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21020202212112 its reverse (21121220202012), we get a palindrome (42141422414124).

The spelling of 21020202212112 in words is "twenty-one trillion, twenty billion, two hundred two million, two hundred twelve thousand, one hundred twelve".