12120110021021 has 4 divisors (see below), whose sum is σ = 12120150322944. Its totient is φ = 12120069719100.

The previous prime is 12120110021011. The next prime is 12120110021081. The reversal of 12120110021021 is 12012001102121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12120110021021 - 2¹⁸ = 12120109758877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120110020987 and 12120110021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120110021011) 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, 19696445 + ... + 20302466.

It is an arithmetic number, because the mean of its divisors is an integer number (3030037580736).

Almost surely, 2^{12120110021021} is an apocalyptic number.

It is an amenable number.

12120110021021 is a deficient number, since it is larger than the sum of its proper divisors (40301923).

12120110021021 is an equidigital number, since it uses as much as digits as its factorization.

12120110021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40301922.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12120110021021 its reverse (12012001102121), we get a palindrome (24132111123142).

It can be divided in two parts, 121201100 and 21021, that added together give a palindrome (121222121).

The spelling of 12120110021021 in words is "twelve trillion, one hundred twenty billion, one hundred ten million, twenty-one thousand, twenty-one".