231111203397 has 4 divisors (see below), whose sum is σ = 308148271200. Its totient is φ = 154074135596.

The previous prime is 231111203359. The next prime is 231111203399. The reversal of 231111203397 is 793302111132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231111203397 - 2¹⁵ = 231111170629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231111203399) 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, 38518533897 + ... + 38518533902.

It is an arithmetic number, because the mean of its divisors is an integer number (77037067800).

Almost surely, 2^231111203397 is an apocalyptic number.

It is an amenable number.

231111203397 is a deficient number, since it is larger than the sum of its proper divisors (77037067803).

231111203397 is an equidigital number, since it uses as much as digits as its factorization.

231111203397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77037067802.

The product of its (nonzero) digits is 6804, while the sum is 33.

The spelling of 231111203397 in words is "two hundred thirty-one billion, one hundred eleven million, two hundred three thousand, three hundred ninety-seven".