212122223123 has 16 divisors (see below), whose sum is σ = 214127218176. Its totient is φ = 210128415840.

The previous prime is 212122223107. The next prime is 212122223147. The reversal of 212122223123 is 321322221212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212122223123 - 2⁴ = 212122223107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212122223023) 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, 89013590 + ... + 89015972.

It is an arithmetic number, because the mean of its divisors is an integer number (13382951136).

Almost surely, 2^212122223123 is an apocalyptic number.

212122223123 is a deficient number, since it is larger than the sum of its proper divisors (2004995053).

212122223123 is a wasteful number, since it uses less digits than its factorization.

212122223123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4394.

The product of its digits is 1152, while the sum is 23.

Adding to 212122223123 its reverse (321322221212), we get a palindrome (533444444335).

The spelling of 212122223123 in words is "two hundred twelve billion, one hundred twenty-two million, two hundred twenty-three thousand, one hundred twenty-three".