21020133112112 has 20 divisors (see below), whose sum is σ = 40757198607456. Its totient is φ = 10502146374720.

The previous prime is 21020133112093. The next prime is 21020133112117. The reversal of 21020133112112 is 21121133102012.

It is a super-2 number, since 2×21020133112112² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21020133112117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494989439 + ... + 495031902.

Almost surely, 2^{21020133112112} is an apocalyptic number.

It is an amenable number.

21020133112112 is a deficient number, since it is larger than the sum of its proper divisors (19737065495344).

21020133112112 is a wasteful number, since it uses less digits than its factorization.

21020133112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990022676 (or 990022670 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21020133112112 its reverse (21121133102012), we get a palindrome (42141266214124).

It can be divided in two parts, 2102013 and 3112112, that added together give a palindrome (5214125).

The spelling of 21020133112112 in words is "twenty-one trillion, twenty billion, one hundred thirty-three million, one hundred twelve thousand, one hundred twelve".