31103212199 has 4 divisors (see below), whose sum is σ = 31187962464. Its totient is φ = 31018461936.

The previous prime is 31103212183. The next prime is 31103212201. The reversal of 31103212199 is 99121230113.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31103212199 - 2⁴ = 31103212183 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 (31103212999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42374582 + ... + 42375315.

It is an arithmetic number, because the mean of its divisors is an integer number (7796990616).

Almost surely, 2^31103212199 is an apocalyptic number.

31103212199 is a deficient number, since it is larger than the sum of its proper divisors (84750265).

31103212199 is an equidigital number, since it uses as much as digits as its factorization.

31103212199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84750264.

The product of its (nonzero) digits is 2916, while the sum is 32.

The spelling of 31103212199 in words is "thirty-one billion, one hundred three million, two hundred twelve thousand, one hundred ninety-nine".