2120135430 has 96 divisors (see below), whose sum is σ = 5933399040. Its totient is φ = 483430080.

The previous prime is 2120135389. The next prime is 2120135491. The reversal of 2120135430 is 345310212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 2120135397 and 2120135406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 702625 + ... + 705635.

It is an arithmetic number, because the mean of its divisors is an integer number (61806240).

Almost surely, 2^2120135430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120135430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2966699520).

2120135430 is an abundant number, since it is smaller than the sum of its proper divisors (3813263610).

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

2120135430 is a wasteful number, since it uses less digits than its factorization.

2120135430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514 (or 3507 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2120135430 is about 46044.9283852196. The cubic root of 2120135430 is about 1284.6590121088.

Adding to 2120135430 its reverse (345310212), we get a palindrome (2465445642).

It can be divided in two parts, 2120 and 135430, that added together give a triangular number (137550 = T₅₂₄).

The spelling of 2120135430 in words is "two billion, one hundred twenty million, one hundred thirty-five thousand, four hundred thirty".