2520121320 has 48 divisors (see below), whose sum is σ = 8190395460. Its totient is φ = 672032256.

The previous prime is 2520121313. The next prime is 2520121337. The reversal of 2520121320 is 231210252.

2520121320 is a `hidden beast` number, since 2 + 520 + 12 + 132 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2479442436 + 40678884 = 49794^2 + 6378^2 .

It is a super-2 number, since 2×2520121320² = 12702022935037084800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2520121293 and 2520121302.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3499809 + ... + 3500528.

Almost surely, 2^2520121320 is an apocalyptic number.

2520121320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2520121320 is an abundant number, since it is smaller than the sum of its proper divisors (5670274140).

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

2520121320 is a wasteful number, since it uses less digits than its factorization.

2520121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7000354 (or 7000347 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2520121320 is about 50200.8099536253. The cubic root of 2520121320 is about 1360.8402607359.

Adding to 2520121320 its reverse (231210252), we get a palindrome (2751331572).

The spelling of 2520121320 in words is "two billion, five hundred twenty million, one hundred twenty-one thousand, three hundred twenty".