121431132 has 36 divisors (see below), whose sum is σ = 307347040. Its totient is φ = 40424832.

The previous prime is 121431103. The next prime is 121431157. The reversal of 121431132 is 231134121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34653 + ... + 37995.

Almost surely, 2^121431132 is an apocalyptic number.

121431132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121431132 is an abundant number, since it is smaller than the sum of its proper divisors (185915908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121431132 is a wasteful number, since it uses less digits than its factorization.

121431132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4362 (or 4357 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 121431132 is about 11019.5794838097. The cubic root of 121431132 is about 495.1954905839.

Adding to 121431132 its reverse (231134121), we get a palindrome (352565253).

The spelling of 121431132 in words is "one hundred twenty-one million, four hundred thirty-one thousand, one hundred thirty-two".