12220221092921 has 2 divisors, whose sum is σ = 12220221092922. Its totient is φ = 12220221092920.

The previous prime is 12220221092881. The next prime is 12220221092941. The reversal of 12220221092921 is 12929012202221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8243531034025 + 3976690058896 = 2871155^2 + 1994164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12220221092921 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12220221092941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110110546460 + 6110110546461.

It is an arithmetic number, because the mean of its divisors is an integer number (6110110546461).

Almost surely, 2^{12220221092921} is an apocalyptic number.

It is an amenable number.

12220221092921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220221092921 is an equidigital number, since it uses as much as digits as its factorization.

12220221092921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 12220221092921 in words is "twelve trillion, two hundred twenty billion, two hundred twenty-one million, ninety-two thousand, nine hundred twenty-one".