221421255572067 has 32 divisors (see below), whose sum is σ = 315692182149120. Its totient is φ = 137702565242880.

The previous prime is 221421255572059. The next prime is 221421255572087. The reversal of 221421255572067 is 760275552124122.

It is not a de Polignac number, because 221421255572067 - 2³ = 221421255572059 is a prime.

It is a super-2 number, since 2×221421255572067² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221421255572057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6315342 + ... + 21971027.

It is an arithmetic number, because the mean of its divisors is an integer number (9865380692160).

Almost surely, 2^{221421255572067} is an apocalyptic number.

221421255572067 is a deficient number, since it is larger than the sum of its proper divisors (94270926577053).

221421255572067 is a wasteful number, since it uses less digits than its factorization.

221421255572067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28289203.

The product of its (nonzero) digits is 4704000, while the sum is 51.

The spelling of 221421255572067 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-five million, five hundred seventy-two thousand, sixty-seven".