21120100022212 has 48 divisors (see below), whose sum is σ = 39206370373632. Its totient is φ = 9920584627200.

The previous prime is 21120100022183. The next prime is 21120100022251. The reversal of 21120100022212 is 21222000102112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80720233 + ... + 80981455.

It is an arithmetic number, because the mean of its divisors is an integer number (816799382784).

Almost surely, 2^{21120100022212} is an apocalyptic number.

It is an amenable number.

21120100022212 is a deficient number, since it is larger than the sum of its proper divisors (18086270351420).

21120100022212 is a wasteful number, since it uses less digits than its factorization.

21120100022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263428 (or 263426 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21120100022212 its reverse (21222000102112), we get a palindrome (42342100124324).

The spelling of 21120100022212 in words is "twenty-one trillion, one hundred twenty billion, one hundred million, twenty-two thousand, two hundred twelve".