121331436 has 24 divisors (see below), whose sum is σ = 290759280. Its totient is φ = 39350592.

The previous prime is 121331429. The next prime is 121331437. The reversal of 121331436 is 634133121.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (121331437) 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, 136191 + ... + 137078.

It is an arithmetic number, because the mean of its divisors is an integer number (12114970).

Almost surely, 2^121331436 is an apocalyptic number.

It is an amenable number.

121331436 is an abundant number, since it is smaller than the sum of its proper divisors (169427844).

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

121331436 is a wasteful number, since it uses less digits than its factorization.

121331436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273313 (or 273311 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 121331436 is about 11015.0549703576. The cubic root of 121331436 is about 495.0599335654.

Adding to 121331436 its reverse (634133121), we get a palindrome (755464557).

The spelling of 121331436 in words is "one hundred twenty-one million, three hundred thirty-one thousand, four hundred thirty-six".