121451131 has 4 divisors (see below), whose sum is σ = 124733632. Its totient is φ = 118168632.

The previous prime is 121451107. The next prime is 121451147. The reversal of 121451131 is 131154121.

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 121451131 - 2⁷ = 121451003 is a prime.

It is a super-2 number, since 2×121451131² = 29500754442358322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121451099 and 121451108.

It is not an unprimeable number, because it can be changed into a prime (121451171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641195 + ... + 1641268.

It is an arithmetic number, because the mean of its divisors is an integer number (31183408).

Almost surely, 2^121451131 is an apocalyptic number.

121451131 is a deficient number, since it is larger than the sum of its proper divisors (3282501).

121451131 is an equidigital number, since it uses as much as digits as its factorization.

121451131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3282500.

The product of its digits is 120, while the sum is 19.

The square root of 121451131 is about 11020.4868767219. The cubic root of 121451131 is about 495.2226743624. Note that the first 3 decimals are identical.

The spelling of 121451131 in words is "one hundred twenty-one million, four hundred fifty-one thousand, one hundred thirty-one".