2102131 has 4 divisors (see below), whose sum is σ = 2193552. Its totient is φ = 2010712.

The previous prime is 2102117. The next prime is 2102137. The reversal of 2102131 is 1312012.

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

It is a cyclic number.

It is not a de Polignac number, because 2102131 - 2⁵ = 2102099 is a prime.

It is a super-2 number, since 2×2102131² = 8837909482322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102137) 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, 45676 + ... + 45721.

It is an arithmetic number, because the mean of its divisors is an integer number (548388).

2^2102131 is an apocalyptic number.

2102131 is a deficient number, since it is larger than the sum of its proper divisors (91421).

2102131 is an equidigital number, since it uses as much as digits as its factorization.

2102131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91420.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2102131 is about 1449.8727530373. The cubic root of 2102131 is about 128.1012179536.

Adding to 2102131 its reverse (1312012), we get a palindrome (3414143).

The spelling of 2102131 in words is "two million, one hundred two thousand, one hundred thirty-one".