12021311312021 has 4 divisors (see below), whose sum is σ = 13114157794944. Its totient is φ = 10928464829100.

The previous prime is 12021311312009. The next prime is 12021311312053.

12021311312021 is nontrivially palindromic in base 10.

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 12021311312021 - 2¹⁸ = 12021311049877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021311311984 and 12021311312002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021311312081) 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, 546423241445 + ... + 546423241466.

It is an arithmetic number, because the mean of its divisors is an integer number (3278539448736).

Almost surely, 2^{12021311312021} is an apocalyptic number.

12021311312021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12021311312021 is a deficient number, since it is larger than the sum of its proper divisors (1092846482923).

12021311312021 is a wasteful number, since it uses less digits than its factorization.

12021311312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092846482922.

The product of its (nonzero) digits is 144, while the sum is 20.

It can be divided in two parts, 1202131 and 1312021, that added together give a palindrome (2514152).

The spelling of 12021311312021 in words is "twelve trillion, twenty-one billion, three hundred eleven million, three hundred twelve thousand, twenty-one".