213231223122 has 16 divisors (see below), whose sum is σ = 436380178080. Its totient is φ = 69424119072.

The previous prime is 213231223111. The next prime is 213231223133. The reversal of 213231223122 is 221322132312.

It is an interprime number because it is at equal distance from previous prime (213231223111) and next prime (213231223133).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 213231223092 and 213231223101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413238547 + ... + 413239062.

It is an arithmetic number, because the mean of its divisors is an integer number (27273761130).

Almost surely, 2^213231223122 is an apocalyptic number.

213231223122 is an abundant number, since it is smaller than the sum of its proper divisors (223148954958).

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

213231223122 is a wasteful number, since it uses less digits than its factorization.

213231223122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826477657.

The product of its digits is 1728, while the sum is 24.

Adding to 213231223122 its reverse (221322132312), we get a palindrome (434553355434).

The spelling of 213231223122 in words is "two hundred thirteen billion, two hundred thirty-one million, two hundred twenty-three thousand, one hundred twenty-two".