221321102103131 has 2 divisors, whose sum is σ = 221321102103132. Its totient is φ = 221321102103130.

The previous prime is 221321102103107. The next prime is 221321102103151. The reversal of 221321102103131 is 131301201123122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221321102103131 is a prime.

It is a super-2 number, since 2×221321102103131² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221321102103097 and 221321102103106.

It is not a weakly prime, because it can be changed into another prime (221321102103151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110660551051565 + 110660551051566.

It is an arithmetic number, because the mean of its divisors is an integer number (110660551051566).

Almost surely, 2^{221321102103131} is an apocalyptic number.

221321102103131 is a deficient number, since it is larger than the sum of its proper divisors (1).

221321102103131 is an equidigital number, since it uses as much as digits as its factorization.

221321102103131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 221321102103131 its reverse (131301201123122), we get a palindrome (352622303226253).

The spelling of 221321102103131 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, one hundred two million, one hundred three thousand, one hundred thirty-one".