221021012230131 has 16 divisors (see below), whose sum is σ = 313309523494656. Its totient is φ = 138281672402016.

The previous prime is 221021012230127. The next prime is 221021012230159. The reversal of 221021012230131 is 131032210120122.

It is not a de Polignac number, because 221021012230131 - 2² = 221021012230127 is a prime.

It is a super-2 number, since 2×221021012230131² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221021012230098 and 221021012230107.

It is not an unprimeable number, because it can be changed into a prime (221021012230831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30218893285 + ... + 30218900598.

It is an arithmetic number, because the mean of its divisors is an integer number (19581845218416).

Almost surely, 2^{221021012230131} is an apocalyptic number.

221021012230131 is a deficient number, since it is larger than the sum of its proper divisors (92288511264525).

221021012230131 is a wasteful number, since it uses less digits than its factorization.

221021012230131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60437793962.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 221021012230131 its reverse (131032210120122), we get a palindrome (352053222350253).

The spelling of 221021012230131 in words is "two hundred twenty-one trillion, twenty-one billion, twelve million, two hundred thirty thousand, one hundred thirty-one".