221101011131 has 32 divisors (see below), whose sum is σ = 296930188800. Its totient is φ = 158997646080.

The previous prime is 221101011107. The next prime is 221101011139. The reversal of 221101011131 is 131110101122.

It is a de Polignac number, because none of the positive numbers 2^k-221101011131 is a prime.

It is a super-2 number, since 2×221101011131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221101011139) 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, 4871300 + ... + 4916478.

It is an arithmetic number, because the mean of its divisors is an integer number (9279068400).

Almost surely, 2^221101011131 is an apocalyptic number.

221101011131 is a deficient number, since it is larger than the sum of its proper divisors (75829177669).

221101011131 is a wasteful number, since it uses less digits than its factorization.

221101011131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50099.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 221101011131 its reverse (131110101122), we get a palindrome (352211112253).

The spelling of 221101011131 in words is "two hundred twenty-one billion, one hundred one million, eleven thousand, one hundred thirty-one".