2120401320 has 32 divisors (see below), whose sum is σ = 6361204320. Its totient is φ = 565440320.

The previous prime is 2120401277. The next prime is 2120401321. The reversal of 2120401320 is 231040212.

It is a super-2 number, since 2×2120401320² = 8992203515715484800, which contains 22 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 2120401320.

It is not an unprimeable number, because it can be changed into a prime (2120401321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8834886 + ... + 8835125.

It is an arithmetic number, because the mean of its divisors is an integer number (198787635).

Almost surely, 2^2120401320 is an apocalyptic number.

2120401320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120401320 is an abundant number, since it is smaller than the sum of its proper divisors (4240803000).

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

2120401320 is a wasteful number, since it uses less digits than its factorization.

2120401320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17670025 (or 17670021 counting only the distinct ones).

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

The square root of 2120401320 is about 46047.8155833694. The cubic root of 2120401320 is about 1284.7127136636.

Adding to 2120401320 its reverse (231040212), we get a palindrome (2351441532).

The spelling of 2120401320 in words is "two billion, one hundred twenty million, four hundred one thousand, three hundred twenty".