2121631260 has 48 divisors (see below), whose sum is σ = 6789221376. Its totient is φ = 484944192.

The previous prime is 2121631243. The next prime is 2121631307. The reversal of 2121631260 is 621361212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121631260.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2525332 + ... + 2526171.

It is an arithmetic number, because the mean of its divisors is an integer number (141442112).

Almost surely, 2^2121631260 is an apocalyptic number.

2121631260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121631260 is an abundant number, since it is smaller than the sum of its proper divisors (4667590116).

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

2121631260 is a wasteful number, since it uses less digits than its factorization.

2121631260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051522 (or 5051520 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 2121631260 is about 46061.1686781827. The cubic root of 2121631260 is about 1284.9610650994.

Adding to 2121631260 its reverse (621361212), we get a palindrome (2742992472).

The spelling of 2121631260 in words is "two billion, one hundred twenty-one million, six hundred thirty-one thousand, two hundred sixty".