221050655427 has 16 divisors (see below), whose sum is σ = 356653158912. Its totient is φ = 118884385920.

The previous prime is 221050655411. The next prime is 221050655429. The reversal of 221050655427 is 724556050122.

It is not a de Polignac number, because 221050655427 - 2⁴ = 221050655411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221050655429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309594399 + ... + 309595112.

It is an arithmetic number, because the mean of its divisors is an integer number (22290822432).

Almost surely, 2^221050655427 is an apocalyptic number.

221050655427 is a deficient number, since it is larger than the sum of its proper divisors (135602503485).

221050655427 is a wasteful number, since it uses less digits than its factorization.

221050655427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619189538.

The product of its (nonzero) digits is 168000, while the sum is 39.

The spelling of 221050655427 in words is "two hundred twenty-one billion, fifty million, six hundred fifty-five thousand, four hundred twenty-seven".