20110120220101 has 4 divisors (see below), whose sum is σ = 20110129247872. Its totient is φ = 20110111192332.

The previous prime is 20110120220077. The next prime is 20110120220161. The reversal of 20110120220101 is 10102202101102.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20110120220101 - 2⁹ = 20110120219589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110120220161) 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, 1484716 + ... + 6513418.

It is an arithmetic number, because the mean of its divisors is an integer number (5027532311968).

Almost surely, 2^{20110120220101} is an apocalyptic number.

It is an amenable number.

20110120220101 is a deficient number, since it is larger than the sum of its proper divisors (9027771).

20110120220101 is an equidigital number, since it uses as much as digits as its factorization.

20110120220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9027770.

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

Adding to 20110120220101 its reverse (10102202101102), we get a palindrome (30212322321203).

The spelling of 20110120220101 in words is "twenty trillion, one hundred ten billion, one hundred twenty million, two hundred twenty thousand, one hundred one".