20220122021221 has 2 divisors, whose sum is σ = 20220122021222. Its totient is φ = 20220122021220.

The previous prime is 20220122021167. The next prime is 20220122021237. The reversal of 20220122021221 is 12212022102202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15748952565025 + 4471169456196 = 3968495^2 + 2114514^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220122021221 - 2¹⁵ = 20220121988453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20220122621221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110061010610 + 10110061010611.

It is an arithmetic number, because the mean of its divisors is an integer number (10110061010611).

Almost surely, 2^{20220122021221} is an apocalyptic number.

It is an amenable number.

20220122021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220122021221 is an equidigital number, since it uses as much as digits as its factorization.

20220122021221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20220122021221 its reverse (12212022102202), we get a palindrome (32432144123423).

The spelling of 20220122021221 in words is "twenty trillion, two hundred twenty billion, one hundred twenty-two million, twenty-one thousand, two hundred twenty-one".