221127763212 has 48 divisors (see below), whose sum is σ = 591787571200. Its totient is φ = 71331535440.

The previous prime is 221127763189. The next prime is 221127763237. The reversal of 221127763212 is 212367721122.

221127763212 is a `hidden beast` number, since 2 + 2 + 1 + 1 + 2 + 7 + 7 + 632 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 33020512 + ... + 33027207.

Almost surely, 2^221127763212 is an apocalyptic number.

It is an amenable number.

221127763212 is an abundant number, since it is smaller than the sum of its proper divisors (370659807988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221127763212 is a wasteful number, since it uses less digits than its factorization.

221127763212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66047763 (or 66047755 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The spelling of 221127763212 in words is "two hundred twenty-one billion, one hundred twenty-seven million, seven hundred sixty-three thousand, two hundred twelve".