20110220002121 has 4 divisors (see below), whose sum is σ = 20124312659472. Its totient is φ = 20096127344772.

The previous prime is 20110220002051. The next prime is 20110220002163. The reversal of 20110220002121 is 12120002201102.

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 20110220002121 - 2¹⁰ = 20110220001097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110220002096 and 20110220002105.

It is not an unprimeable number, because it can be changed into a prime (20110220002921) 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, 7046326535 + ... + 7046329388.

It is an arithmetic number, because the mean of its divisors is an integer number (5031078164868).

Almost surely, 2^{20110220002121} is an apocalyptic number.

It is an amenable number.

20110220002121 is a deficient number, since it is larger than the sum of its proper divisors (14092657351).

20110220002121 is a wasteful number, since it uses less digits than its factorization.

20110220002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14092657350.

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

Adding to 20110220002121 its reverse (12120002201102), we get a palindrome (32230222203223).

The spelling of 20110220002121 in words is "twenty trillion, one hundred ten billion, two hundred twenty million, two thousand, one hundred twenty-one".