121205433 has 16 divisors (see below), whose sum is σ = 168892416. Its totient is φ = 77241360.

The previous prime is 121205429. The next prime is 121205437. The reversal of 121205433 is 334502121.

It is an interprime number because it is at equal distance from previous prime (121205429) and next prime (121205437).

It is not a de Polignac number, because 121205433 - 2² = 121205429 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121205437) 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, 3933 + ... + 16058.

It is an arithmetic number, because the mean of its divisors is an integer number (10555776).

Almost surely, 2^121205433 is an apocalyptic number.

It is an amenable number.

121205433 is a deficient number, since it is larger than the sum of its proper divisors (47686983).

121205433 is a wasteful number, since it uses less digits than its factorization.

121205433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20084.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 121205433 is about 11009.3339035566. Note that the first 3 decimals coincide. The cubic root of 121205433 is about 494.8885005471. Note that the first 3 decimals are identical.

Adding to 121205433 its reverse (334502121), we get a palindrome (455707554).

The spelling of 121205433 in words is "one hundred twenty-one million, two hundred five thousand, four hundred thirty-three".