20110120100121 has 16 divisors (see below), whose sum is σ = 26938517574528. Its totient is φ = 13344314880000.

The previous prime is 20110120100099. The next prime is 20110120100123. The reversal of 20110120100121 is 12100102101102.

It is not a de Polignac number, because 20110120100121 - 2⁹ = 20110120099609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20110120100097 and 20110120100106.

It is not an unprimeable number, because it can be changed into a prime (20110120100123) 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, 9021205 + ... + 11027346.

It is an arithmetic number, because the mean of its divisors is an integer number (1683657348408).

Almost surely, 2^{20110120100121} is an apocalyptic number.

It is an amenable number.

20110120100121 is a deficient number, since it is larger than the sum of its proper divisors (6828397474407).

20110120100121 is a wasteful number, since it uses less digits than its factorization.

20110120100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20050112.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20110120100121 its reverse (12100102101102), we get a palindrome (32210222201223).

The spelling of 20110120100121 in words is "twenty trillion, one hundred ten billion, one hundred twenty million, one hundred thousand, one hundred twenty-one".