221544077134212 has 96 divisors (see below), whose sum is σ = 656429320413440. Its totient is φ = 63298073894400.

The previous prime is 221544077134207. The next prime is 221544077134241. The reversal of 221544077134212 is 212431770445122.

221544077134212 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 440 + 77 + 134 + 2 + 1 + 2 = 666.

It is a super-2 number, since 2×221544077134212² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 408650268 + ... + 409192044.

Almost surely, 2^{221544077134212} is an apocalyptic number.

It is an amenable number.

221544077134212 is an abundant number, since it is smaller than the sum of its proper divisors (434885243279228).

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

221544077134212 is a wasteful number, since it uses less digits than its factorization.

221544077134212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082698 (or 1082690 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 221544077134212 in words is "two hundred twenty-one trillion, five hundred forty-four billion, seventy-seven million, one hundred thirty-four thousand, two hundred twelve".