131032210021 has 2 divisors, whose sum is σ = 131032210022. Its totient is φ = 131032210020.

The previous prime is 131032209977. The next prime is 131032210039. The reversal of 131032210021 is 120012230131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129175548100 + 1856661921 = 359410^2 + 43089^2 .

It is a cyclic number.

It is not a de Polignac number, because 131032210021 - 2¹⁵ = 131032177253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131032209977 and 131032210004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131032210121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65516105010 + 65516105011.

It is an arithmetic number, because the mean of its divisors is an integer number (65516105011).

Almost surely, 2^131032210021 is an apocalyptic number.

It is an amenable number.

131032210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

131032210021 is an equidigital number, since it uses as much as digits as its factorization.

131032210021 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 16.

Adding to 131032210021 its reverse (120012230131), we get a palindrome (251044440152).

The spelling of 131032210021 in words is "one hundred thirty-one billion, thirty-two million, two hundred ten thousand, twenty-one".