21022100111212 has 12 divisors (see below), whose sum is σ = 37975406652736. Its totient is φ = 10171983924720.

The previous prime is 21022100111183. The next prime is 21022100111269. The reversal of 21022100111212 is 21211100122012.

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, 84766532583 + ... + 84766532830.

Almost surely, 2^{21022100111212} is an apocalyptic number.

It is an amenable number.

21022100111212 is a deficient number, since it is larger than the sum of its proper divisors (16953306541524).

21022100111212 is a wasteful number, since it uses less digits than its factorization.

21022100111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169533065448 (or 169533065446 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21022100111212 its reverse (21211100122012), we get a palindrome (42233200233224).

The spelling of 21022100111212 in words is "twenty-one trillion, twenty-two billion, one hundred million, one hundred eleven thousand, two hundred twelve".