2312201202021 has 12 divisors (see below), whose sum is σ = 3536307720972. Its totient is φ = 1450792910976.

The previous prime is 2312201202013. The next prime is 2312201202041. The reversal of 2312201202021 is 1202021022132.

2312201202021 is a `hidden beast` number, since 231 + 220 + 12 + 0 + 202 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1684580751396 + 627620450625 = 1297914^2 + 792225^2 .

It is not a de Polignac number, because 2312201202021 - 2³ = 2312201202013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2312201201985 and 2312201202003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312201202001) 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, 7556212926 + ... + 7556213231.

It is an arithmetic number, because the mean of its divisors is an integer number (294692310081).

Almost surely, 2^{2312201202021} is an apocalyptic number.

It is an amenable number.

2312201202021 is a deficient number, since it is larger than the sum of its proper divisors (1224106518951).

2312201202021 is a wasteful number, since it uses less digits than its factorization.

2312201202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15112426180 (or 15112426177 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2312201202021 its reverse (1202021022132), we get a palindrome (3514222224153).

The spelling of 2312201202021 in words is "two trillion, three hundred twelve billion, two hundred one million, two hundred two thousand, twenty-one".