2121514220 has 48 divisors (see below), whose sum is σ = 5210059008. Its totient is φ = 710458560.

The previous prime is 2121514207. The next prime is 2121514229. The reversal of 2121514220 is 224151212.

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 = 2121514192 and 2121514201.

It is not an unprimeable number, because it can be changed into a prime (2121514229) 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, 170186 + ... + 182225.

It is an arithmetic number, because the mean of its divisors is an integer number (108542896).

Almost surely, 2^2121514220 is an apocalyptic number.

2121514220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121514220 is an abundant number, since it is smaller than the sum of its proper divisors (3088544788).

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

2121514220 is a wasteful number, since it uses less digits than its factorization.

2121514220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352470 (or 352468 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2121514220 is about 46059.8981761792. The cubic root of 2121514220 is about 1284.9374363298.

Adding to 2121514220 its reverse (224151212), we get a palindrome (2345665432).

The spelling of 2121514220 in words is "two billion, one hundred twenty-one million, five hundred fourteen thousand, two hundred twenty".