121431533 has 8 divisors (see below), whose sum is σ = 123952896. Its totient is φ = 118918800.

The previous prime is 121431523. The next prime is 121431551. The reversal of 121431533 is 335134121.

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 121431533 - 2⁶ = 121431469 is a prime.

It is a super-3 number, since 3×121431533³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121431499 and 121431508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121431523) 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, 31628 + ... + 35258.

It is an arithmetic number, because the mean of its divisors is an integer number (15494112).

Almost surely, 2^121431533 is an apocalyptic number.

It is an amenable number.

121431533 is a deficient number, since it is larger than the sum of its proper divisors (2521363).

121431533 is an equidigital number, since it uses as much as digits as its factorization.

121431533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4315.

The product of its digits is 1080, while the sum is 23.

The square root of 121431533 is about 11019.5976786814. The cubic root of 121431533 is about 495.1960356752.

Adding to 121431533 its reverse (335134121), we get a palindrome (456565654).

The spelling of 121431533 in words is "one hundred twenty-one million, four hundred thirty-one thousand, five hundred thirty-three".