20100002022121 has 4 divisors (see below), whose sum is σ = 22971430882432. Its totient is φ = 17228573161812.

The previous prime is 20100002022109. The next prime is 20100002022179. The reversal of 20100002022121 is 12122020000102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20100002022121 - 2³⁷ = 19962563068649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20100002022521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435714430145 + ... + 1435714430158.

It is an arithmetic number, because the mean of its divisors is an integer number (5742857720608).

Almost surely, 2^{20100002022121} is an apocalyptic number.

It is an amenable number.

20100002022121 is a deficient number, since it is larger than the sum of its proper divisors (2871428860311).

20100002022121 is an equidigital number, since it uses as much as digits as its factorization.

20100002022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871428860310.

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

Adding to 20100002022121 its reverse (12122020000102), we get a palindrome (32222022022223).

The spelling of 20100002022121 in words is "twenty trillion, one hundred billion, two million, twenty-two thousand, one hundred twenty-one".