21120111222212 has 12 divisors (see below), whose sum is σ = 37428045204480. Its totient is φ = 10426384020936.

The previous prime is 21120111222191. The next prime is 21120111222233. The reversal of 21120111222212 is 21222211102112.

It is an interprime number because it is at equal distance from previous prime (21120111222191) and next prime (21120111222233).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33417897188 + ... + 33417897819.

It is an arithmetic number, because the mean of its divisors is an integer number (3119003767040).

Almost surely, 2^{21120111222212} is an apocalyptic number.

It is an amenable number.

21120111222212 is a deficient number, since it is larger than the sum of its proper divisors (16307933982268).

21120111222212 is a wasteful number, since it uses less digits than its factorization.

21120111222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66835795090 (or 66835795088 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21120111222212 its reverse (21222211102112), we get a palindrome (42342322324324).

The spelling of 21120111222212 in words is "twenty-one trillion, one hundred twenty billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twelve".