121997356 has 24 divisors (see below), whose sum is σ = 230265504. Its totient is φ = 56221440.

The previous prime is 121997353. The next prime is 121997357. The reversal of 121997356 is 653799121.

It is not an unprimeable number, because it can be changed into a prime (121997353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44481 + ... + 47143.

It is an arithmetic number, because the mean of its divisors is an integer number (9594396).

Almost surely, 2^121997356 is an apocalyptic number.

It is an amenable number.

121997356 is a deficient number, since it is larger than the sum of its proper divisors (108268148).

121997356 is a wasteful number, since it uses less digits than its factorization.

121997356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3561 (or 3559 counting only the distinct ones).

The product of its digits is 102060, while the sum is 43.

The square root of 121997356 is about 11045.2413282825. The cubic root of 121997356 is about 495.9639834670.

The spelling of 121997356 in words is "one hundred twenty-one million, nine hundred ninety-seven thousand, three hundred fifty-six".