121997436 has 48 divisors (see below), whose sum is σ = 318944640. Its totient is φ = 35968320.

The previous prime is 121997417. The next prime is 121997437. The reversal of 121997436 is 634799121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121997437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7606 + ... + 17373.

It is an arithmetic number, because the mean of its divisors is an integer number (6644680).

Almost surely, 2^121997436 is an apocalyptic number.

It is an amenable number.

121997436 is an abundant number, since it is smaller than the sum of its proper divisors (196947204).

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

121997436 is a wasteful number, since it uses less digits than its factorization.

121997436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25034 (or 25032 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 121997436 is about 11045.2449497510. The cubic root of 121997436 is about 495.9640918767.

The spelling of 121997436 in words is "one hundred twenty-one million, nine hundred ninety-seven thousand, four hundred thirty-six".