20102100012121 has 4 divisors (see below), whose sum is σ = 20102114131200. Its totient is φ = 20102085893044.

The previous prime is 20102100012101. The next prime is 20102100012157. The reversal of 20102100012121 is 12121000120102.

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 20102100012121 - 2⁴¹ = 17903076756569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102100012101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4649701 + ... + 7862818.

It is an arithmetic number, because the mean of its divisors is an integer number (5025528532800).

Almost surely, 2^{20102100012121} is an apocalyptic number.

It is an amenable number.

20102100012121 is a deficient number, since it is larger than the sum of its proper divisors (14119079).

20102100012121 is a wasteful number, since it uses less digits than its factorization.

20102100012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14119078.

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

Adding to 20102100012121 its reverse (12121000120102), we get a palindrome (32223100132223).

The spelling of 20102100012121 in words is "twenty trillion, one hundred two billion, one hundred million, twelve thousand, one hundred twenty-one".