221326477366 has 32 divisors (see below), whose sum is σ = 344412262656. Its totient is φ = 106558848000.

The previous prime is 221326477349. The next prime is 221326477391. The reversal of 221326477366 is 663774623122.

It is a congruent number.

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, 19732776 + ... + 19743988.

It is an arithmetic number, because the mean of its divisors is an integer number (10762883208).

Almost surely, 2^221326477366 is an apocalyptic number.

221326477366 is a deficient number, since it is larger than the sum of its proper divisors (123085785290).

221326477366 is a wasteful number, since it uses less digits than its factorization.

221326477366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12808.

The product of its digits is 3048192, while the sum is 49.

The spelling of 221326477366 in words is "two hundred twenty-one billion, three hundred twenty-six million, four hundred seventy-seven thousand, three hundred sixty-six".