213112222223129 has 4 divisors (see below), whose sum is σ = 213112359962676. Its totient is φ = 213112084483584.

The previous prime is 213112222223071. The next prime is 213112222223161. The reversal of 213112222223129 is 921322222211312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 35952075960025 + 177160146263104 = 5996005^2 + 13310152^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213112222223129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213112222222129) 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, 66522284 + ... + 69652269.

It is an arithmetic number, because the mean of its divisors is an integer number (53278089990669).

Almost surely, 2^{213112222223129} is an apocalyptic number.

It is an amenable number.

213112222223129 is a deficient number, since it is larger than the sum of its proper divisors (137739547).

213112222223129 is a wasteful number, since it uses less digits than its factorization.

213112222223129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137739546.

The product of its digits is 20736, while the sum is 35.

The spelling of 213112222223129 in words is "two hundred thirteen trillion, one hundred twelve billion, two hundred twenty-two million, two hundred twenty-three thousand, one hundred twenty-nine".