121555414 has 16 divisors (see below), whose sum is σ = 196823520. Its totient is φ = 56129920.

The previous prime is 121555411. The next prime is 121555429. The reversal of 121555414 is 414555121.

It is a super-2 number, since 2×121555414² = 29551437345422792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121555411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44227 + ... + 46894.

It is an arithmetic number, because the mean of its divisors is an integer number (12301470).

Almost surely, 2^121555414 is an apocalyptic number.

121555414 is a deficient number, since it is larger than the sum of its proper divisors (75268106).

121555414 is a wasteful number, since it uses less digits than its factorization.

121555414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91175.

The product of its digits is 4000, while the sum is 28.

The square root of 121555414 is about 11025.2171860694. The cubic root of 121555414 is about 495.3643734193.

The spelling of 121555414 in words is "one hundred twenty-one million, five hundred fifty-five thousand, four hundred fourteen".