221011042131 has 32 divisors (see below), whose sum is σ = 358080503040. Its totient is φ = 133611984000.

The previous prime is 221011042121. The next prime is 221011042177. The reversal of 221011042131 is 131240110122.

221011042131 is a `hidden beast` number, since 2 + 210 + 1 + 1 + 0 + 421 + 31 = 666.

It is not a de Polignac number, because 221011042131 - 2⁵ = 221011042099 is a prime.

It is a super-2 number, since 2×221011042131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221011042121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 808765 + ... + 1046958.

It is an arithmetic number, because the mean of its divisors is an integer number (11190015720).

Almost surely, 2^221011042131 is an apocalyptic number.

221011042131 is a deficient number, since it is larger than the sum of its proper divisors (137069460909).

221011042131 is a wasteful number, since it uses less digits than its factorization.

221011042131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856144 (or 1856138 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 221011042131 its reverse (131240110122), we get a palindrome (352251152253).

The spelling of 221011042131 in words is "two hundred twenty-one billion, eleven million, forty-two thousand, one hundred thirty-one".