12120412021 has 32 divisors (see below), whose sum is σ = 13297996800. Its totient is φ = 11002279680.

The previous prime is 12120411977. The next prime is 12120412039. The reversal of 12120412021 is 12021402121.

It is a cyclic number.

It is not a de Polignac number, because 12120412021 - 2⁷ = 12120411893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120411986 and 12120412004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120412061) 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, 27608920 + ... + 27609358.

It is an arithmetic number, because the mean of its divisors is an integer number (415562400).

Almost surely, 2^12120412021 is an apocalyptic number.

It is an amenable number.

12120412021 is a deficient number, since it is larger than the sum of its proper divisors (1177584779).

12120412021 is a wasteful number, since it uses less digits than its factorization.

12120412021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12120412021 its reverse (12021402121), we get a palindrome (24141814142).

It can be divided in two parts, 121204 and 12021, that added together give a square (133225 = 365²).

The spelling of 12120412021 in words is "twelve billion, one hundred twenty million, four hundred twelve thousand, twenty-one".