212120111022123 has 32 divisors (see below), whose sum is σ = 296633859793920. Its totient is φ = 134574556723200.

The previous prime is 212120111022109. The next prime is 212120111022133. The reversal of 212120111022123 is 321220111021212.

It is not a de Polignac number, because 212120111022123 - 2⁵ = 212120111022091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212120111022123.

It is not an unprimeable number, because it can be changed into a prime (212120111022133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 773823 + ... + 20611623.

It is an arithmetic number, because the mean of its divisors is an integer number (9269808118560).

Almost surely, 2^{212120111022123} is an apocalyptic number.

212120111022123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

212120111022123 is a deficient number, since it is larger than the sum of its proper divisors (84513748771797).

212120111022123 is a wasteful number, since it uses less digits than its factorization.

212120111022123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19838619.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 212120111022123 its reverse (321220111021212), we get a palindrome (533340222043335).

The spelling of 212120111022123 in words is "two hundred twelve trillion, one hundred twenty billion, one hundred eleven million, twenty-two thousand, one hundred twenty-three".