21120022221112 has 32 divisors (see below), whose sum is σ = 40419649360800. Its totient is φ = 10342164486784.

The previous prime is 21120022221101. The next prime is 21120022221127. The reversal of 21120022221112 is 21112222002112.

It is a self number, because there is not a number n which added to its sum of digits gives 21120022221112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44477812 + ... + 44950147.

It is an arithmetic number, because the mean of its divisors is an integer number (1263114042525).

Almost surely, 2^{21120022221112} is an apocalyptic number.

It is an amenable number.

21120022221112 is a deficient number, since it is larger than the sum of its proper divisors (19299627139688).

21120022221112 is a wasteful number, since it uses less digits than its factorization.

21120022221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89428575 (or 89428571 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21120022221112 its reverse (21112222002112), we get a palindrome (42232244223224).

The spelling of 21120022221112 in words is "twenty-one trillion, one hundred twenty billion, twenty-two million, two hundred twenty-one thousand, one hundred twelve".