2121326247 has 8 divisors (see below), whose sum is σ = 2888614656. Its totient is φ = 1384127672.

The previous prime is 2121326237. The next prime is 2121326257. The reversal of 2121326247 is 7426231212.

It is an interprime number because it is at equal distance from previous prime (2121326237) and next prime (2121326257).

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 2121326247 - 2²⁰ = 2120277671 is a prime.

It is a super-2 number, since 2×2121326247² = 9000050092422210018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121326237) 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, 7522293 + ... + 7522574.

It is an arithmetic number, because the mean of its divisors is an integer number (361076832).

Almost surely, 2^2121326247 is an apocalyptic number.

2121326247 is a deficient number, since it is larger than the sum of its proper divisors (767288409).

2121326247 is a wasteful number, since it uses less digits than its factorization.

2121326247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15044917.

The product of its digits is 8064, while the sum is 30.

The square root of 2121326247 is about 46057.8576032364. The cubic root of 2121326247 is about 1284.8994853423.

Adding to 2121326247 its reverse (7426231212), we get a palindrome (9547557459).

The spelling of 2121326247 in words is "two billion, one hundred twenty-one million, three hundred twenty-six thousand, two hundred forty-seven".