2520345121 has 4 divisors (see below), whose sum is σ = 2880394432. Its totient is φ = 2160295812.

The previous prime is 2520345109. The next prime is 2520345133. The reversal of 2520345121 is 1215430252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2520345109) and next prime (2520345133).

It is a cyclic number.

It is not a de Polignac number, because 2520345121 - 2³¹ = 372861473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520325121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180024645 + ... + 180024658.

It is an arithmetic number, because the mean of its divisors is an integer number (720098608).

Almost surely, 2^2520345121 is an apocalyptic number.

It is an amenable number.

2520345121 is a deficient number, since it is larger than the sum of its proper divisors (360049311).

2520345121 is an equidigital number, since it uses as much as digits as its factorization.

2520345121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360049310.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2520345121 is about 50203.0389617999. The cubic root of 2520345121 is about 1360.8805429760.

Adding to 2520345121 its reverse (1215430252), we get a palindrome (3735775373).

The spelling of 2520345121 in words is "two billion, five hundred twenty million, three hundred forty-five thousand, one hundred twenty-one".