2101003131 has 4 divisors (see below), whose sum is σ = 2801337512. Its totient is φ = 1400668752.

The previous prime is 2101003127. The next prime is 2101003169. The reversal of 2101003131 is 1313001012.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2101003131 - 2² = 2101003127 is a prime.

It is a super-2 number, since 2×2101003131² = 8828428312943606322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101001131) 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, 350167186 + ... + 350167191.

It is an arithmetic number, because the mean of its divisors is an integer number (700334378).

Almost surely, 2^2101003131 is an apocalyptic number.

2101003131 is a deficient number, since it is larger than the sum of its proper divisors (700334381).

2101003131 is an equidigital number, since it uses as much as digits as its factorization.

2101003131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700334380.

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

The square root of 2101003131 is about 45836.7006993304. The cubic root of 2101003131 is about 1280.7830354909.

Adding to 2101003131 its reverse (1313001012), we get a palindrome (3414004143).

The spelling of 2101003131 in words is "two billion, one hundred one million, three thousand, one hundred thirty-one".