121451231 has 4 divisors (see below), whose sum is σ = 132492264. Its totient is φ = 110410200.

The previous prime is 121451219. The next prime is 121451257. The reversal of 121451231 is 132154121.

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 121451231 - 2⁶ = 121451167 is a prime.

It is a super-2 number, since 2×121451231² = 29500803022830722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121451531) 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, 5520500 + ... + 5520521.

It is an arithmetic number, because the mean of its divisors is an integer number (33123066).

Almost surely, 2^121451231 is an apocalyptic number.

121451231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121451231 is a deficient number, since it is larger than the sum of its proper divisors (11041033).

121451231 is a wasteful number, since it uses less digits than its factorization.

121451231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11041032.

The product of its digits is 240, while the sum is 20.

The square root of 121451231 is about 11020.4914137256. The cubic root of 121451231 is about 495.2228102805. Note that the first 3 decimals are identical.

The spelling of 121451231 in words is "one hundred twenty-one million, four hundred fifty-one thousand, two hundred thirty-one".