12412111021 has 4 divisors (see below), whose sum is σ = 12414362272. Its totient is φ = 12409859772.

The previous prime is 12412110973. The next prime is 12412111027. The reversal of 12412111021 is 12011121421.

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 12412111021 - 2⁹ = 12412110509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12412110986 and 12412111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12412111027) 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, 1117335 + ... + 1128388.

It is an arithmetic number, because the mean of its divisors is an integer number (3103590568).

Almost surely, 2^12412111021 is an apocalyptic number.

It is an amenable number.

12412111021 is a deficient number, since it is larger than the sum of its proper divisors (2251251).

12412111021 is an equidigital number, since it uses as much as digits as its factorization.

12412111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251250.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12412111021 its reverse (12011121421), we get a palindrome (24423232442).

The spelling of 12412111021 in words is "twelve billion, four hundred twelve million, one hundred eleven thousand, twenty-one".