12120311021 has 8 divisors (see below), whose sum is σ = 14917305984. Its totient is φ = 9589696560.

The previous prime is 12120311017. The next prime is 12120311023. The reversal of 12120311021 is 12011302121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12120311021 - 2² = 12120311017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12120310987 and 12120311005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120311023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66595025 + ... + 66595206.

It is an arithmetic number, because the mean of its divisors is an integer number (1864663248).

Almost surely, 2^12120311021 is an apocalyptic number.

It is an amenable number.

12120311021 is a deficient number, since it is larger than the sum of its proper divisors (2796994963).

12120311021 is a wasteful number, since it uses less digits than its factorization.

12120311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133190251.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12120311021 its reverse (12011302121), we get a palindrome (24131613142).

The spelling of 12120311021 in words is "twelve billion, one hundred twenty million, three hundred eleven thousand, twenty-one".