2121131376 has 120 divisors (see below), whose sum is σ = 7306164320. Its totient is φ = 559415808.

The previous prime is 2121131371. The next prime is 2121131413. The reversal of 2121131376 is 6731311212.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121131371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67831 + ... + 94038.

Almost surely, 2^2121131376 is an apocalyptic number.

2121131376 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2121131376 is an abundant number, since it is smaller than the sum of its proper divisors (5185032944).

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

2121131376 is a wasteful number, since it uses less digits than its factorization.

2121131376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161903 (or 161894 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 2121131376 is about 46055.7420524303. The cubic root of 2121131376 is about 1284.8601393097.

Adding to 2121131376 its reverse (6731311212), we get a palindrome (8852442588).

The spelling of 2121131376 in words is "two billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred seventy-six".