21112222002112 has 28 divisors (see below), whose sum is σ = 43716068387856. Its totient is φ = 10097149652480.

The previous prime is 21112222002077. The next prime is 21112222002119. The reversal of 21112222002112 is 21120022221112.

It is a self number, because there is not a number n which added to its sum of digits gives 21112222002112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112222002119) 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, 7171269589 + ... + 7171272532.

Almost surely, 2^{21112222002112} is an apocalyptic number.

It is an amenable number.

21112222002112 is an abundant number, since it is smaller than the sum of its proper divisors (22603846385744).

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

21112222002112 is a wasteful number, since it uses less digits than its factorization.

21112222002112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14342542156 (or 14342542146 counting only the distinct ones).

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

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

The spelling of 21112222002112 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, two thousand, one hundred twelve".