221081911057 has 8 divisors (see below), whose sum is σ = 254901015936. Its totient is φ = 187821799872.

The previous prime is 221081911033. The next prime is 221081911091. The reversal of 221081911057 is 750119180122.

221081911057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-221081911057 is a prime.

It is a super-2 number, since 2×221081911057² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221081912057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139747573 + ... + 139749154.

It is an arithmetic number, because the mean of its divisors is an integer number (31862626992).

Almost surely, 2^221081911057 is an apocalyptic number.

It is an amenable number.

221081911057 is a deficient number, since it is larger than the sum of its proper divisors (33819104879).

221081911057 is a wasteful number, since it uses less digits than its factorization.

221081911057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279496847.

The product of its (nonzero) digits is 10080, while the sum is 37.

The spelling of 221081911057 in words is "two hundred twenty-one billion, eighty-one million, nine hundred eleven thousand, fifty-seven".