12120213102123 has 32 divisors (see below), whose sum is σ = 18698633920512. Its totient is φ = 6839748871200.

The previous prime is 12120213102121. The next prime is 12120213102191. The reversal of 12120213102123 is 32120131202121.

It is not a de Polignac number, because 12120213102123 - 2¹ = 12120213102121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12120213102123.

It is not an unprimeable number, because it can be changed into a prime (12120213102121) 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, 3174228 + ... + 5857998.

It is an arithmetic number, because the mean of its divisors is an integer number (584332310016).

Almost surely, 2^{12120213102123} is an apocalyptic number.

12120213102123 is a deficient number, since it is larger than the sum of its proper divisors (6578420818389).

12120213102123 is a wasteful number, since it uses less digits than its factorization.

12120213102123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686455.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 12120213102123 its reverse (32120131202121), we get a palindrome (44240344304244).

The spelling of 12120213102123 in words is "twelve trillion, one hundred twenty billion, two hundred thirteen million, one hundred two thousand, one hundred twenty-three".