12123132211021 has 16 divisors (see below), whose sum is σ = 13624802545536. Its totient is φ = 10702870934976.

The previous prime is 12123132211013. The next prime is 12123132211051. The reversal of 12123132211021 is 12011223132121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12123132211021 - 2³ = 12123132211013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12123132210983 and 12123132211001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123132211051) 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, 548851 + ... + 4954543.

It is an arithmetic number, because the mean of its divisors is an integer number (851550159096).

Almost surely, 2^{12123132211021} is an apocalyptic number.

It is an amenable number.

12123132211021 is a deficient number, since it is larger than the sum of its proper divisors (1501670334515).

12123132211021 is a wasteful number, since it uses less digits than its factorization.

12123132211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414932.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12123132211021 its reverse (12011223132121), we get a palindrome (24134355343142).

The spelling of 12123132211021 in words is "twelve trillion, one hundred twenty-three billion, one hundred thirty-two million, two hundred eleven thousand, twenty-one".