21021122120112 has 60 divisors (see below), whose sum is σ = 60727686137664. Its totient is φ = 6781007134080.

The previous prime is 21021122120099. The next prime is 21021122120147. The reversal of 21021122120112 is 21102122112012.

21021122120112 is a `hidden beast` number, since 21 + 0 + 211 + 221 + 201 + 12 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2354511903 + ... + 2354520830.

Almost surely, 2^{21021122120112} is an apocalyptic number.

It is an amenable number.

21021122120112 is an abundant number, since it is smaller than the sum of its proper divisors (39706564017552).

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

21021122120112 is a wasteful number, since it uses less digits than its factorization.

21021122120112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4709032778 (or 4709032769 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21021122120112 its reverse (21102122112012), we get a palindrome (42123244232124).

It can be divided in two parts, 2102112 and 2120112, that added together give a palindrome (4222224).

The spelling of 21021122120112 in words is "twenty-one trillion, twenty-one billion, one hundred twenty-two million, one hundred twenty thousand, one hundred twelve".