20100000120121 has 4 divisors (see below), whose sum is σ = 20114125209472. Its totient is φ = 20085875030772.

The previous prime is 20100000120113. The next prime is 20100000120197. The reversal of 20100000120121 is 12102100000102.

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 20100000120121 - 2³ = 20100000120113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100000120098 and 20100000120107.

It is not an unprimeable number, because it can be changed into a prime (20100000120521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7062542541 + ... + 7062545386.

It is an arithmetic number, because the mean of its divisors is an integer number (5028531302368).

Almost surely, 2^{20100000120121} is an apocalyptic number.

It is an amenable number.

20100000120121 is a deficient number, since it is larger than the sum of its proper divisors (14125089351).

20100000120121 is a wasteful number, since it uses less digits than its factorization.

20100000120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14125089350.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20100000120121 its reverse (12102100000102), we get a palindrome (32202100120223).

The spelling of 20100000120121 in words is "twenty trillion, one hundred billion, one hundred twenty thousand, one hundred twenty-one".