12311111202021 has 12 divisors (see below), whose sum is σ = 18718648611520. Its totient is φ = 7775438653800.

The previous prime is 12311111202001. The next prime is 12311111202023. The reversal of 12311111202021 is 12020211111321.

It is a happy number.

12311111202021 is a `hidden beast` number, since 1 + 231 + 111 + 120 + 202 + 1 = 666.

It is not a de Polignac number, because 12311111202021 - 2⁶ = 12311111201957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12311111201985 and 12311111202003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311111202023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35997401005 + ... + 35997401346.

Almost surely, 2^{12311111202021} is an apocalyptic number.

It is an amenable number.

12311111202021 is a deficient number, since it is larger than the sum of its proper divisors (6407537409499).

12311111202021 is a wasteful number, since it uses less digits than its factorization.

12311111202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71994802376 (or 71994802373 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 12311111202021 its reverse (12020211111321), we get a palindrome (24331322313342).

The spelling of 12311111202021 in words is "twelve trillion, three hundred eleven billion, one hundred eleven million, two hundred two thousand, twenty-one".