12311220001021 has 8 divisors (see below), whose sum is σ = 12857536457280. Its totient is φ = 11765824046592.

The previous prime is 12311220001007. The next prime is 12311220001027. The reversal of 12311220001021 is 12010002211321.

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 12311220001021 - 2¹⁹ = 12311219476733 is a prime.

It is a super-2 number, since 2×12311220001021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12311220000986 and 12311220001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311220001027) 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, 230098116 + ... + 230151613.

It is an arithmetic number, because the mean of its divisors is an integer number (1607192057160).

Almost surely, 2^{12311220001021} is an apocalyptic number.

It is an amenable number.

12311220001021 is a deficient number, since it is larger than the sum of its proper divisors (546316456259).

12311220001021 is a wasteful number, since it uses less digits than its factorization.

12311220001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460250915.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12311220001021 its reverse (12010002211321), we get a palindrome (24321222212342).

The spelling of 12311220001021 in words is "twelve trillion, three hundred eleven billion, two hundred twenty million, one thousand, twenty-one".