2131241420 has 48 divisors (see below), whose sum is σ = 5579981568. Its totient is φ = 664282560.

The previous prime is 2131241369. The next prime is 2131241423. The reversal of 2131241420 is 241421312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2131241392 and 2131241401.

It is not an unprimeable number, because it can be changed into a prime (2131241423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 690422 + ... + 693501.

It is an arithmetic number, because the mean of its divisors is an integer number (116249616).

Almost surely, 2^2131241420 is an apocalyptic number.

2131241420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131241420 is an abundant number, since it is smaller than the sum of its proper divisors (3448740148).

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

2131241420 is a wasteful number, since it uses less digits than its factorization.

2131241420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383950 (or 1383948 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2131241420 is about 46165.3703548450. The cubic root of 2131241420 is about 1286.8982668397.

Adding to 2131241420 its reverse (241421312), we get a palindrome (2372662732).

The spelling of 2131241420 in words is "two billion, one hundred thirty-one million, two hundred forty-one thousand, four hundred twenty".