221210103131 has 2 divisors, whose sum is σ = 221210103132. Its totient is φ = 221210103130.

The previous prime is 221210103067. The next prime is 221210103151. The reversal of 221210103131 is 131301012122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221210103131 - 2⁶ = 221210103067 is a prime.

It is a super-2 number, since 2×221210103131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221210103151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605051565 + 110605051566.

It is an arithmetic number, because the mean of its divisors is an integer number (110605051566).

Almost surely, 2^221210103131 is an apocalyptic number.

221210103131 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210103131 is an equidigital number, since it uses as much as digits as its factorization.

221210103131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 221210103131 its reverse (131301012122), we get a palindrome (352511115253).

The spelling of 221210103131 in words is "two hundred twenty-one billion, two hundred ten million, one hundred three thousand, one hundred thirty-one".