20110120002 has 24 divisors (see below), whose sum is σ = 49796487936. Its totient is φ = 5745748536.

The previous prime is 20110119979. The next prime is 20110120003. The reversal of 20110120002 is 20002101102.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20110120003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79801938 + ... + 79802189.

It is an arithmetic number, because the mean of its divisors is an integer number (2074853664).

Almost surely, 2^20110120002 is an apocalyptic number.

20110120002 is an abundant number, since it is smaller than the sum of its proper divisors (29686367934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20110120002 is a wasteful number, since it uses less digits than its factorization.

20110120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159604142 (or 159604139 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20110120002 its reverse (20002101102), we get a palindrome (40112221104).

The spelling of 20110120002 in words is "twenty billion, one hundred ten million, one hundred twenty thousand, two".