21222876188 has 12 divisors (see below), whose sum is σ = 37143872472. Its totient is φ = 10610341200.

The previous prime is 21222876161. The next prime is 21222876203. The reversal of 21222876188 is 88167822212.

It is a super-2 number, since 2×21222876188² (a number of 21 digits) contains 22 as substring.

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, 229895 + ... + 308702.

It is an arithmetic number, because the mean of its divisors is an integer number (3095322706).

Almost surely, 2^21222876188 is an apocalyptic number.

It is an amenable number.

21222876188 is a deficient number, since it is larger than the sum of its proper divisors (15920996284).

21222876188 is a wasteful number, since it uses less digits than its factorization.

21222876188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548452 (or 548450 counting only the distinct ones).

The product of its digits is 344064, while the sum is 47.

The spelling of 21222876188 in words is "twenty-one billion, two hundred twenty-two million, eight hundred seventy-six thousand, one hundred eighty-eight".