2121140365 has 8 divisors (see below), whose sum is σ = 2550940920. Its totient is φ = 1693197312.

The previous prime is 2121140363. The next prime is 2121140369. The reversal of 2121140365 is 5630411212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 104591529 + 2016548836 = 10227^2 + 44906^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121140365 - 2¹ = 2121140363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121140363) 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, 461860 + ... + 466429.

It is an arithmetic number, because the mean of its divisors is an integer number (318867615).

Almost surely, 2^2121140365 is an apocalyptic number.

It is an amenable number.

2121140365 is a deficient number, since it is larger than the sum of its proper divisors (429800555).

2121140365 is an equidigital number, since it uses as much as digits as its factorization.

2121140365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928751.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2121140365 is about 46055.8396405928. The cubic root of 2121140365 is about 1284.8619543146.

Adding to 2121140365 its reverse (5630411212), we get a palindrome (7751551577).

The spelling of 2121140365 in words is "two billion, one hundred twenty-one million, one hundred forty thousand, three hundred sixty-five".