131100131621 has 2 divisors, whose sum is σ = 131100131622. Its totient is φ = 131100131620.

The previous prime is 131100131573. The next prime is 131100131639. The reversal of 131100131621 is 126131001131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120815332225 + 10284799396 = 347585^2 + 101414^2 .

It is an emirp because it is prime and its reverse (126131001131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131100131621 - 2³⁰ = 130026389797 is a prime.

It is a super-2 number, since 2×131100131621² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131100131593 and 131100131602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131100131681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65550065810 + 65550065811.

It is an arithmetic number, because the mean of its divisors is an integer number (65550065811).

Almost surely, 2^131100131621 is an apocalyptic number.

It is an amenable number.

131100131621 is a deficient number, since it is larger than the sum of its proper divisors (1).

131100131621 is an equidigital number, since it uses as much as digits as its factorization.

131100131621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 131100131621 its reverse (126131001131), we get a palindrome (257231132752).

The spelling of 131100131621 in words is "one hundred thirty-one billion, one hundred million, one hundred thirty-one thousand, six hundred twenty-one".