2031212399 has 4 divisors (see below), whose sum is σ = 2031540264. Its totient is φ = 2030884536.

The previous prime is 2031212387. The next prime is 2031212419. The reversal of 2031212399 is 9932121302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9932121302 = 2 ⋅4966060651.

It is a cyclic number.

It is not a de Polignac number, because 2031212399 - 2¹² = 2031208303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031212329) 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, 154457 + ... + 167090.

It is an arithmetic number, because the mean of its divisors is an integer number (507885066).

Almost surely, 2^2031212399 is an apocalyptic number.

2031212399 is a deficient number, since it is larger than the sum of its proper divisors (327865).

2031212399 is an equidigital number, since it uses as much as digits as its factorization.

2031212399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327864.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 2031212399 is about 45068.9737957278. The cubic root of 2031212399 is about 1266.4414402025.

The spelling of 2031212399 in words is "two billion, thirty-one million, two hundred twelve thousand, three hundred ninety-nine".