20003131101 has 4 divisors (see below), whose sum is σ = 26670841472. Its totient is φ = 13335420732.

The previous prime is 20003131097. The next prime is 20003131121. The reversal of 20003131101 is 10113130002.

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 not a de Polignac number, because 20003131101 - 2² = 20003131097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003131121) 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, 3333855181 + ... + 3333855186.

It is an arithmetic number, because the mean of its divisors is an integer number (6667710368).

Almost surely, 2^20003131101 is an apocalyptic number.

It is an amenable number.

20003131101 is a deficient number, since it is larger than the sum of its proper divisors (6667710371).

20003131101 is an equidigital number, since it uses as much as digits as its factorization.

20003131101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667710370.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 20003131101 its reverse (10113130002), we get a palindrome (30116261103).

It can be divided in two parts, 200031 and 31101, that added together give a palindrome (231132).

The spelling of 20003131101 in words is "twenty billion, three million, one hundred thirty-one thousand, one hundred one".