213231212130 has 32 divisors (see below), whose sum is σ = 511822157184. Its totient is φ = 56854184576.

The previous prime is 213231212123. The next prime is 213231212137. The reversal of 213231212130 is 31212132312.

It is an interprime number because it is at equal distance from previous prime (213231212123) and next prime (213231212137).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213231212097 and 213231212106.

It is not an unprimeable number, because it can be changed into a prime (213231212137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232974 + ... + 693353.

It is an arithmetic number, because the mean of its divisors is an integer number (15994442412).

Almost surely, 2^213231212130 is an apocalyptic number.

213231212130 is an abundant number, since it is smaller than the sum of its proper divisors (298590945054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213231212130 is a wasteful number, since it uses less digits than its factorization.

213231212130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934010.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213231212130 its reverse (31212132312), we get a palindrome (244443344442).

The spelling of 213231212130 in words is "two hundred thirteen billion, two hundred thirty-one million, two hundred twelve thousand, one hundred thirty".