221285871268998 has 32 divisors (see below), whose sum is σ = 449830988236032. Its totient is φ = 72552104157600.

The previous prime is 221285871268991. The next prime is 221285871269033. The reversal of 221285871268998 is 899862178582122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221285871268991) 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, 39765633 + ... + 44987523.

It is an arithmetic number, because the mean of its divisors is an integer number (14057218382376).

Almost surely, 2^{221285871268998} is an apocalyptic number.

221285871268998 is an abundant number, since it is smaller than the sum of its proper divisors (228545116967034).

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

221285871268998 is a wasteful number, since it uses less digits than its factorization.

221285871268998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5337740.

The product of its digits is 1114767360, while the sum is 78.

The spelling of 221285871268998 in words is "two hundred twenty-one trillion, two hundred eighty-five billion, eight hundred seventy-one million, two hundred sixty-eight thousand, nine hundred ninety-eight".