21120222011112 has 128 divisors (see below), whose sum is σ = 67051278969600. Its totient is φ = 6034083185664.

The previous prime is 21120222011081. The next prime is 21120222011117. The reversal of 21120222011112 is 21111022202112.

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 (21120222011117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35376588 + ... + 35968644.

It is an arithmetic number, because the mean of its divisors is an integer number (523838116950).

Almost surely, 2^{21120222011112} is an apocalyptic number.

It is an amenable number.

21120222011112 is an abundant number, since it is smaller than the sum of its proper divisors (45931056958488).

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

21120222011112 is a wasteful number, since it uses less digits than its factorization.

21120222011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615672 (or 615662 counting only the distinct ones).

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

Adding to 21120222011112 its reverse (21111022202112), we get a palindrome (42231244213224).

The spelling of 21120222011112 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-two million, eleven thousand, one hundred twelve".