22100111121212 has 12 divisors (see below), whose sum is σ = 38675665155960. Its totient is φ = 11049921076656.

The previous prime is 22100111121173. The next prime is 22100111121287. The reversal of 22100111121212 is 21212111100122.

It is a congruent number.

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, 33250787 + ... + 33908922.

It is an arithmetic number, because the mean of its divisors is an integer number (3222972096330).

Almost surely, 2^{22100111121212} is an apocalyptic number.

It is an amenable number.

22100111121212 is a deficient number, since it is larger than the sum of its proper divisors (16575554034748).

22100111121212 is a wasteful number, since it uses less digits than its factorization.

22100111121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67241980 (or 67241978 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 22100111121212 its reverse (21212111100122), we get a palindrome (43312222221334).

The spelling of 22100111121212 in words is "twenty-two trillion, one hundred billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twelve".