221240234131 has 24 divisors (see below), whose sum is σ = 270948706560. Its totient is φ = 179625675600.

The previous prime is 221240234101. The next prime is 221240234141. The reversal of 221240234131 is 131432042122.

It is not a de Polignac number, because 221240234131 - 2³⁷ = 83801280659 is a prime.

It is a super-2 number, since 2×221240234131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221240234096 and 221240234105.

It is not an unprimeable number, because it can be changed into a prime (221240234101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7648626 + ... + 7677496.

It is an arithmetic number, because the mean of its divisors is an integer number (11289529440).

Almost surely, 2^221240234131 is an apocalyptic number.

221240234131 is a deficient number, since it is larger than the sum of its proper divisors (49708472429).

221240234131 is a wasteful number, since it uses less digits than its factorization.

221240234131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37135 (or 37128 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 221240234131 its reverse (131432042122), we get a palindrome (352672276253).

The spelling of 221240234131 in words is "two hundred twenty-one billion, two hundred forty million, two hundred thirty-four thousand, one hundred thirty-one".