20210120121001 has 16 divisors (see below), whose sum is σ = 21406148104320. Its totient is φ = 19014893026560.

The previous prime is 20210120120989. The next prime is 20210120121011. The reversal of 20210120121001 is 10012102101202.

It is a cyclic number.

It is not a de Polignac number, because 20210120121001 - 2⁵ = 20210120120969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210120121011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1042447630 + ... + 1042467016.

It is an arithmetic number, because the mean of its divisors is an integer number (1337884256520).

Almost surely, 2^{20210120121001} is an apocalyptic number.

It is an amenable number.

20210120121001 is a deficient number, since it is larger than the sum of its proper divisors (1196027983319).

20210120121001 is a wasteful number, since it uses less digits than its factorization.

20210120121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36864.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20210120121001 its reverse (10012102101202), we get a palindrome (30222222222203).

The spelling of 20210120121001 in words is "twenty trillion, two hundred ten billion, one hundred twenty million, one hundred twenty-one thousand, one".