2123210220 has 48 divisors (see below), whose sum is σ = 6105670368. Its totient is φ = 550886400.

The previous prime is 2123210213. The next prime is 2123210227. The reversal of 2123210220 is 220123212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2123210213) and next prime (2123210227).

It is a super-3 number, since 3×2123210220³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2123210220.

It is not an unprimeable number, because it can be changed into a prime (2123210227) 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, 475981 + ... + 480420.

It is an arithmetic number, because the mean of its divisors is an integer number (127201466).

Almost surely, 2^2123210220 is an apocalyptic number.

2123210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123210220 is an abundant number, since it is smaller than the sum of its proper divisors (3982460148).

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

2123210220 is a wasteful number, since it uses less digits than its factorization.

2123210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956450 (or 956448 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2123210220 is about 46078.3053073787. The cubic root of 2123210220 is about 1285.2797505457.

Adding to 2123210220 its reverse (220123212), we get a palindrome (2343333432).

The spelling of 2123210220 in words is "two billion, one hundred twenty-three million, two hundred ten thousand, two hundred twenty".