12212100122021 has 2 divisors, whose sum is σ = 12212100122022. Its totient is φ = 12212100122020.

The previous prime is 12212100122009. The next prime is 12212100122039. The reversal of 12212100122021 is 12022100121221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10768990444996 + 1443109677025 = 3281614^2 + 1201295^2 .

It is an emirp because it is prime and its reverse (12022100121221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212100122021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212100122821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106050061010 + 6106050061011.

It is an arithmetic number, because the mean of its divisors is an integer number (6106050061011).

Almost surely, 2^{12212100122021} is an apocalyptic number.

It is an amenable number.

12212100122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212100122021 is an equidigital number, since it uses as much as digits as its factorization.

12212100122021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12212100122021 its reverse (12022100121221), we get a palindrome (24234200243242).

The spelling of 12212100122021 in words is "twelve trillion, two hundred twelve billion, one hundred million, one hundred twenty-two thousand, twenty-one".