213123131122 has 8 divisors (see below), whose sum is σ = 348746941872. Its totient is φ = 96874150500.

The previous prime is 213123131101. The next prime is 213123131149. The reversal of 213123131122 is 221131321312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 9687415051 = 213123131122 / (2 + 1 + 3 + 1 + 2 + 3 + 1 + 3 + 1 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 213123131093 and 213123131102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4843707504 + ... + 4843707547.

It is an arithmetic number, because the mean of its divisors is an integer number (43593367734).

Almost surely, 2^213123131122 is an apocalyptic number.

213123131122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

213123131122 is a deficient number, since it is larger than the sum of its proper divisors (135623810750).

213123131122 is a wasteful number, since it uses less digits than its factorization.

213123131122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9687415064.

The product of its digits is 432, while the sum is 22.

Adding to 213123131122 its reverse (221131321312), we get a palindrome (434254452434).

The spelling of 213123131122 in words is "two hundred thirteen billion, one hundred twenty-three million, one hundred thirty-one thousand, one hundred twenty-two".