2102131420 has 24 divisors (see below), whose sum is σ = 4416272784. Its totient is φ = 840510336.

The previous prime is 2102131403. The next prime is 2102131441. The reversal of 2102131420 is 241312012.

It is a junction number, because it is equal to n+sod(n) for n = 2102131394 and 2102131403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32259 + ... + 72421.

It is an arithmetic number, because the mean of its divisors is an integer number (184011366).

Almost surely, 2^2102131420 is an apocalyptic number.

2102131420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102131420 is an abundant number, since it is smaller than the sum of its proper divisors (2314141364).

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

2102131420 is a wasteful number, since it uses less digits than its factorization.

2102131420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42789 (or 42787 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2102131420 is about 45849.0067504194. The cubic root of 2102131420 is about 1281.0122648501.

Adding to 2102131420 its reverse (241312012), we get a palindrome (2343443432).

It can be divided in two parts, 21021 and 31420, that added together give a square (52441 = 229²).

The spelling of 2102131420 in words is "two billion, one hundred two million, one hundred thirty-one thousand, four hundred twenty".