131000031202421 has 2 divisors, whose sum is σ = 131000031202422. Its totient is φ = 131000031202420.

The previous prime is 131000031202387. The next prime is 131000031202457. The reversal of 131000031202421 is 124202130000131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128362781872900 + 2637249329521 = 11329730^2 + 1623961^2 .

It is a cyclic number.

It is not a de Polignac number, because 131000031202421 - 2⁶ = 131000031202357 is a prime.

It is a super-2 number, since 2×131000031202421² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131000031202393 and 131000031202402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131000031202321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65500015601210 + 65500015601211.

It is an arithmetic number, because the mean of its divisors is an integer number (65500015601211).

Almost surely, 2^{131000031202421} is an apocalyptic number.

It is an amenable number.

131000031202421 is a deficient number, since it is larger than the sum of its proper divisors (1).

131000031202421 is an equidigital number, since it uses as much as digits as its factorization.

131000031202421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 131000031202421 its reverse (124202130000131), we get a palindrome (255202161202552).

The spelling of 131000031202421 in words is "one hundred thirty-one trillion, thirty-one million, two hundred two thousand, four hundred twenty-one".