2120154125 has 32 divisors (see below), whose sum is σ = 2716942176. Its totient is φ = 1651200000.

The previous prime is 2120154103. The next prime is 2120154149. The reversal of 2120154125 is 5214510212.

It can be written as a sum of positive squares in 16 ways, for example, as 981631561 + 1138522564 = 31331^2 + 33742^2 .

It is not a de Polignac number, because 2120154125 - 2²⁴ = 2103376909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120154125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 768749 + ... + 771501.

It is an arithmetic number, because the mean of its divisors is an integer number (84904443).

Almost surely, 2^2120154125 is an apocalyptic number.

2120154125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2120154125 is a deficient number, since it is larger than the sum of its proper divisors (596788051).

2120154125 is a wasteful number, since it uses less digits than its factorization.

2120154125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2930 (or 2920 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2120154125 is about 46045.1313930148. The cubic root of 2120154125 is about 1284.6627880672.

Adding to 2120154125 its reverse (5214510212), we get a palindrome (7334664337).

The spelling of 2120154125 in words is "two billion, one hundred twenty million, one hundred fifty-four thousand, one hundred twenty-five".