213220323131 has 2 divisors, whose sum is σ = 213220323132. Its totient is φ = 213220323130.

The previous prime is 213220323103. The next prime is 213220323203. The reversal of 213220323131 is 131323022312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213220323131 is a prime.

It is a super-2 number, since 2×213220323131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213220323097 and 213220323106.

It is not a weakly prime, because it can be changed into another prime (213220023131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106610161565 + 106610161566.

It is an arithmetic number, because the mean of its divisors is an integer number (106610161566).

Almost surely, 2^213220323131 is an apocalyptic number.

213220323131 is a deficient number, since it is larger than the sum of its proper divisors (1).

213220323131 is an equidigital number, since it uses as much as digits as its factorization.

213220323131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 213220323131 its reverse (131323022312), we get a palindrome (344543345443).

The spelling of 213220323131 in words is "two hundred thirteen billion, two hundred twenty million, three hundred twenty-three thousand, one hundred thirty-one".