131210201021 has 2 divisors, whose sum is σ = 131210201022. Its totient is φ = 131210201020.

The previous prime is 131210201009. The next prime is 131210201033. The reversal of 131210201021 is 120102012131.

It is a balanced prime because it is at equal distance from previous prime (131210201009) and next prime (131210201033).

It can be written as a sum of positive squares in only one way, i.e., 111730416121 + 19479784900 = 334261^2 + 139570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131210201021 is a prime.

It is a super-2 number, since 2×131210201021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131210200987 and 131210201005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131210201081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65605100510 + 65605100511.

It is an arithmetic number, because the mean of its divisors is an integer number (65605100511).

Almost surely, 2^131210201021 is an apocalyptic number.

It is an amenable number.

131210201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

131210201021 is an equidigital number, since it uses as much as digits as its factorization.

131210201021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 131210201021 its reverse (120102012131), we get a palindrome (251312213152).

The spelling of 131210201021 in words is "one hundred thirty-one billion, two hundred ten million, two hundred one thousand, twenty-one".