213231301131 has 4 divisors (see below), whose sum is σ = 284308401512. Its totient is φ = 142154200752.

The previous prime is 213231301109. The next prime is 213231301183. The reversal of 213231301131 is 131103132312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 213231301131 - 2⁶ = 213231301067 is a prime.

It is a super-2 number, since 2×213231301131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213231301098 and 213231301107.

It is not an unprimeable number, because it can be changed into a prime (213231301531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35538550186 + ... + 35538550191.

It is an arithmetic number, because the mean of its divisors is an integer number (71077100378).

Almost surely, 2^213231301131 is an apocalyptic number.

213231301131 is a deficient number, since it is larger than the sum of its proper divisors (71077100381).

213231301131 is an equidigital number, since it uses as much as digits as its factorization.

213231301131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71077100380.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 213231301131 its reverse (131103132312), we get a palindrome (344334433443).

The spelling of 213231301131 in words is "two hundred thirteen billion, two hundred thirty-one million, three hundred one thousand, one hundred thirty-one".