20220012121 has 2 divisors, whose sum is σ = 20220012122. Its totient is φ = 20220012120.

The previous prime is 20220012119. The next prime is 20220012181. The reversal of 20220012121 is 12121002202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13210973721 + 7009038400 = 114939^2 + 83720^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220012121 - 2¹ = 20220012119 is a prime.

Together with 20220012119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20220012181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110006060 + 10110006061.

It is an arithmetic number, because the mean of its divisors is an integer number (10110006061).

Almost surely, 2^20220012121 is an apocalyptic number.

It is an amenable number.

20220012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220012121 is an equidigital number, since it uses as much as digits as its factorization.

20220012121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20220012121 its reverse (12121002202), we get a palindrome (32341014323).

The spelling of 20220012121 in words is "twenty billion, two hundred twenty million, twelve thousand, one hundred twenty-one".