20012122210901 has 2 divisors, whose sum is σ = 20012122210902. Its totient is φ = 20012122210900.

The previous prime is 20012122210859. The next prime is 20012122210903. The reversal of 20012122210901 is 10901222121002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18413796676900 + 1598325534001 = 4291130^2 + 1264249^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012122210901 - 2⁴² = 15614075699797 is a prime.

Together with 20012122210903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012122210903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006061105450 + 10006061105451.

It is an arithmetic number, because the mean of its divisors is an integer number (10006061105451).

Almost surely, 2^{20012122210901} is an apocalyptic number.

It is an amenable number.

20012122210901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012122210901 is an equidigital number, since it uses as much as digits as its factorization.

20012122210901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 20012122210901 its reverse (10901222121002), we get a palindrome (30913344331903).

The spelling of 20012122210901 in words is "twenty trillion, twelve billion, one hundred twenty-two million, two hundred ten thousand, nine hundred one".