12212022201021 has 12 divisors (see below), whose sum is σ = 17821439043772. Its totient is φ = 8057416709376.

The previous prime is 12212022201017. The next prime is 12212022201079. The reversal of 12212022201021 is 12010222021221.

It is a happy number.

12212022201021 is a `hidden beast` number, since 1 + 221 + 202 + 220 + 1 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4877079144921 + 7334943056100 = 2208411^2 + 2708310^2 .

It is not a de Polignac number, because 12212022201021 - 2² = 12212022201017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212022200985 and 12212022201003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212022201011) 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, 6994284466 + ... + 6994286211.

Almost surely, 2^{12212022201021} is an apocalyptic number.

It is an amenable number.

12212022201021 is a deficient number, since it is larger than the sum of its proper divisors (5609416842751).

12212022201021 is a wasteful number, since it uses less digits than its factorization.

12212022201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13988570780 (or 13988570777 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12212022201021 its reverse (12010222021221), we get a palindrome (24222244222242).

The spelling of 12212022201021 in words is "twelve trillion, two hundred twelve billion, twenty-two million, two hundred one thousand, twenty-one".