231211099 has 8 divisors (see below), whose sum is σ = 265863680. Its totient is φ = 196964136.

The previous prime is 231211091. The next prime is 231211103. The reversal of 231211099 is 990112132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231211099 - 2³ = 231211091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231211091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100179 + ... + 102460.

It is an arithmetic number, because the mean of its divisors is an integer number (33232960).

Almost surely, 2^231211099 is an apocalyptic number.

231211099 is a deficient number, since it is larger than the sum of its proper divisors (34652581).

231211099 is a wasteful number, since it uses less digits than its factorization.

231211099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202809.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 231211099 is about 15205.6272149491. The cubic root of 231211099 is about 613.7660932146.

The spelling of 231211099 in words is "two hundred thirty-one million, two hundred eleven thousand, ninety-nine".