20210122201001 has 2 divisors, whose sum is σ = 20210122201002. Its totient is φ = 20210122201000.

The previous prime is 20210122200997. The next prime is 20210122201013. The reversal of 20210122201001 is 10010222101202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16012442418025 + 4197679782976 = 4001555^2 + 2048824^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210122201001 - 2² = 20210122200997 is a prime.

It is not a weakly prime, because it can be changed into another prime (20210122201051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105061100500 + 10105061100501.

It is an arithmetic number, because the mean of its divisors is an integer number (10105061100501).

Almost surely, 2^{20210122201001} is an apocalyptic number.

It is an amenable number.

20210122201001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210122201001 is an equidigital number, since it uses as much as digits as its factorization.

20210122201001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20210122201001 its reverse (10010222101202), we get a palindrome (30220344302203).

The spelling of 20210122201001 in words is "twenty trillion, two hundred ten billion, one hundred twenty-two million, two hundred one thousand, one".