2102131004 has 24 divisors (see below), whose sum is σ = 3867981600. Its totient is φ = 998182080.

The previous prime is 2102130991. The next prime is 2102131007. The reversal of 2102131004 is 4001312012.

It is a self number, because there is not a number n which added to its sum of digits gives 2102131004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102131007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141464 + ... + 155615.

It is an arithmetic number, because the mean of its divisors is an integer number (161165900).

Almost surely, 2^2102131004 is an apocalyptic number.

It is an amenable number.

2102131004 is a deficient number, since it is larger than the sum of its proper divisors (1765850596).

2102131004 is a wasteful number, since it uses less digits than its factorization.

2102131004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297173 (or 297171 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2102131004 is about 45849.0022137887. The cubic root of 2102131004 is about 1281.0121803484.

Adding to 2102131004 its reverse (4001312012), we get a palindrome (6103443016).

It can be divided in two parts, 21021 and 31004, that added together give a palindrome (52025).

The spelling of 2102131004 in words is "two billion, one hundred two million, one hundred thirty-one thousand, four".