2121001323 has 16 divisors (see below), whose sum is σ = 3232728576. Its totient is φ = 1211728320.

The previous prime is 2121001303. The next prime is 2121001343. The reversal of 2121001323 is 3231001212.

It is an interprime number because it is at equal distance from previous prime (2121001303) and next prime (2121001343).

It is not a de Polignac number, because 2121001323 - 2⁵ = 2121001291 is a prime.

It is a super-2 number, since 2×2121001323² = 8997293224335500658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121001303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119218 + ... + 135848.

It is an arithmetic number, because the mean of its divisors is an integer number (202045536).

Almost surely, 2^2121001323 is an apocalyptic number.

2121001323 is a deficient number, since it is larger than the sum of its proper divisors (1111727253).

2121001323 is a wasteful number, since it uses less digits than its factorization.

2121001323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22714.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2121001323 is about 46054.3301221503. The cubic root of 2121001323 is about 1284.8338792152.

Adding to 2121001323 its reverse (3231001212), we get a palindrome (5352002535).

The spelling of 2121001323 in words is "two billion, one hundred twenty-one million, one thousand, three hundred twenty-three".