221771339994 has 32 divisors (see below), whose sum is σ = 458903128320. Its totient is φ = 71364437312.

The previous prime is 221771339981. The next prime is 221771340019. The reversal of 221771339994 is 499933177122.

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, 1174159 + ... + 1349885.

It is an arithmetic number, because the mean of its divisors is an integer number (14340722760).

Almost surely, 2^221771339994 is an apocalyptic number.

221771339994 is an abundant number, since it is smaller than the sum of its proper divisors (237131788326).

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

221771339994 is a wasteful number, since it uses less digits than its factorization.

221771339994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183014.

The product of its digits is 5143824, while the sum is 57.

The spelling of 221771339994 in words is "two hundred twenty-one billion, seven hundred seventy-one million, three hundred thirty-nine thousand, nine hundred ninety-four".