121416436 has 6 divisors (see below), whose sum is σ = 212478770. Its totient is φ = 60708216.

The previous prime is 121416377. The next prime is 121416437. The reversal of 121416436 is 634614121.

It can be written as a sum of positive squares in only one way, i.e., 105062500 + 16353936 = 10250^2 + 4044^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121416437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15177051 + ... + 15177058.

Almost surely, 2^121416436 is an apocalyptic number.

It is an amenable number.

121416436 is a deficient number, since it is larger than the sum of its proper divisors (91062334).

121416436 is a wasteful number, since it uses less digits than its factorization.

121416436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30354113 (or 30354111 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 121416436 is about 11018.9126505295. The cubic root of 121416436 is about 495.1755130421.

The spelling of 121416436 in words is "one hundred twenty-one million, four hundred sixteen thousand, four hundred thirty-six".