121243133 has 16 divisors (see below), whose sum is σ = 142150464. Its totient is φ = 102178560.

The previous prime is 121243103. The next prime is 121243141. The reversal of 121243133 is 331342121.

It is not a de Polignac number, because 121243133 - 2⁶ = 121243069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121243103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7691 + ... + 17367.

It is an arithmetic number, because the mean of its divisors is an integer number (8884404).

Almost surely, 2^121243133 is an apocalyptic number.

It is an amenable number.

121243133 is a deficient number, since it is larger than the sum of its proper divisors (20907331).

121243133 is a wasteful number, since it uses less digits than its factorization.

121243133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9772.

The product of its digits is 432, while the sum is 20.

The square root of 121243133 is about 11011.0459539501. The cubic root of 121243133 is about 494.9398056246.

Adding to 121243133 its reverse (331342121), we get a palindrome (452585254).

The spelling of 121243133 in words is "one hundred twenty-one million, two hundred forty-three thousand, one hundred thirty-three".