2120515220 has 24 divisors (see below), whose sum is σ = 4454217600. Its totient is φ = 847989792.

The previous prime is 2120515219. The next prime is 2120515231. The reversal of 2120515220 is 225150212.

It is a happy number.

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 = 2120515192 and 2120515201.

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, 84041 + ... + 106319.

It is an arithmetic number, because the mean of its divisors is an integer number (185592400).

Almost surely, 2^2120515220 is an apocalyptic number.

2120515220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120515220 is an abundant number, since it is smaller than the sum of its proper divisors (2333702380).

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

2120515220 is a wasteful number, since it uses less digits than its factorization.

2120515220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27047 (or 27045 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2120515220 is about 46049.0523246679. The cubic root of 2120515220 is about 1284.7357165666.

Adding to 2120515220 its reverse (225150212), we get a palindrome (2345665432).

The spelling of 2120515220 in words is "two billion, one hundred twenty million, five hundred fifteen thousand, two hundred twenty".