221761051177115 has 48 divisors (see below), whose sum is σ = 273831516870912. Its totient is φ = 172315085064192.

The previous prime is 221761051177109. The next prime is 221761051177129. The reversal of 221761051177115 is 511771150167122.

It is not a de Polignac number, because 221761051177115 - 2⁸ = 221761051176859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221761051177115.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29014918484 + ... + 29014926126.

It is an arithmetic number, because the mean of its divisors is an integer number (5704823268144).

Almost surely, 2^{221761051177115} is an apocalyptic number.

221761051177115 is a deficient number, since it is larger than the sum of its proper divisors (52070465693797).

221761051177115 is an equidigital number, since it uses as much as digits as its factorization.

221761051177115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11700 (or 11507 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 47.

The spelling of 221761051177115 in words is "two hundred twenty-one trillion, seven hundred sixty-one billion, fifty-one million, one hundred seventy-seven thousand, one hundred fifteen".