121432213 has 16 divisors (see below), whose sum is σ = 141039360. Its totient is φ = 102404736.

The previous prime is 121432189. The next prime is 121432219. The reversal of 121432213 is 312234121.

It is a happy number.

It is not a de Polignac number, because 121432213 - 2¹³ = 121424021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121432219) 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, 126945 + ... + 127897.

It is an arithmetic number, because the mean of its divisors is an integer number (8814960).

Almost surely, 2^121432213 is an apocalyptic number.

It is an amenable number.

121432213 is a deficient number, since it is larger than the sum of its proper divisors (19607147).

121432213 is a wasteful number, since it uses less digits than its factorization.

121432213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236.

The product of its digits is 288, while the sum is 19.

The square root of 121432213 is about 11019.6285327592. The cubic root of 121432213 is about 495.1969600168.

Adding to 121432213 its reverse (312234121), we get a palindrome (433666334).

The spelling of 121432213 in words is "one hundred twenty-one million, four hundred thirty-two thousand, two hundred thirteen".