20100102022121 has 4 divisors (see below), whose sum is σ = 21927384024144. Its totient is φ = 18272820020100.

The previous prime is 20100102022111. The next prime is 20100102022127. The reversal of 20100102022121 is 12122020100102.

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 a de Polignac number, because none of the positive numbers 2^k-20100102022121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100102022096 and 20100102022105.

It is not an unprimeable number, because it can be changed into a prime (20100102022127) 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, 913641000995 + ... + 913641001016.

It is an arithmetic number, because the mean of its divisors is an integer number (5481846006036).

Almost surely, 2^{20100102022121} is an apocalyptic number.

It is an amenable number.

20100102022121 is a deficient number, since it is larger than the sum of its proper divisors (1827282002023).

20100102022121 is a wasteful number, since it uses less digits than its factorization.

20100102022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827282002022.

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

Adding to 20100102022121 its reverse (12122020100102), we get a palindrome (32222122122223).

The spelling of 20100102022121 in words is "twenty trillion, one hundred billion, one hundred two million, twenty-two thousand, one hundred twenty-one".