2121412465 has 4 divisors (see below), whose sum is σ = 2545694964. Its totient is φ = 1697129968.

The previous prime is 2121412463. The next prime is 2121412471. The reversal of 2121412465 is 5642141212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1016780769 + 1104631696 = 31887^2 + 33236^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121412465 - 2¹ = 2121412463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121412463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212141242 + ... + 212141251.

It is an arithmetic number, because the mean of its divisors is an integer number (636423741).

Almost surely, 2^2121412465 is an apocalyptic number.

It is an amenable number.

2121412465 is a deficient number, since it is larger than the sum of its proper divisors (424282499).

2121412465 is an equidigital number, since it uses as much as digits as its factorization.

2121412465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424282498.

The product of its digits is 3840, while the sum is 28.

The square root of 2121412465 is about 46058.7935686553. The cubic root of 2121412465 is about 1284.9168926857.

Adding to 2121412465 its reverse (5642141212), we get a palindrome (7763553677).

The spelling of 2121412465 in words is "two billion, one hundred twenty-one million, four hundred twelve thousand, four hundred sixty-five".