121099231 has 8 divisors (see below), whose sum is σ = 132336000. Its totient is φ = 109900440.

The previous prime is 121099229. The next prime is 121099267. The reversal of 121099231 is 132990121.

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 121099231 - 2¹ = 121099229 is a prime.

It is a super-2 number, since 2×121099231² = 29330047497582722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121099231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121099291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2601 + ... + 15778.

It is an arithmetic number, because the mean of its divisors is an integer number (16542000).

Almost surely, 2^121099231 is an apocalyptic number.

121099231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121099231 is a deficient number, since it is larger than the sum of its proper divisors (11236769).

121099231 is a wasteful number, since it uses less digits than its factorization.

121099231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18989.

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

The square root of 121099231 is about 11004.5095756240. The cubic root of 121099231 is about 494.7439154257.

The spelling of 121099231 in words is "one hundred twenty-one million, ninety-nine thousand, two hundred thirty-one".