2312121999 has 16 divisors (see below), whose sum is σ = 3365040384. Its totient is φ = 1400472000.

The previous prime is 2312121899. The next prime is 2312122003. The reversal of 2312121999 is 9991212132.

It is not a de Polignac number, because 2312121999 - 2¹² = 2312117903 is a prime.

It is a super-3 number, since 3×2312121999³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312121899) 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, 39982 + ... + 78884.

It is an arithmetic number, because the mean of its divisors is an integer number (210315024).

Almost surely, 2^2312121999 is an apocalyptic number.

2312121999 is a deficient number, since it is larger than the sum of its proper divisors (1052918385).

2312121999 is a wasteful number, since it uses less digits than its factorization.

2312121999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40718.

The product of its digits is 17496, while the sum is 39.

The square root of 2312121999 is about 48084.5297263059. The cubic root of 2312121999 is about 1322.3210615019.

The spelling of 2312121999 in words is "two billion, three hundred twelve million, one hundred twenty-one thousand, nine hundred ninety-nine".