121606355 has 16 divisors (see below), whose sum is σ = 166398624. Its totient is φ = 84518400.

The previous prime is 121606349. The next prime is 121606357. The reversal of 121606355 is 553606121.

It is not a de Polignac number, because 121606355 - 2⁴ = 121606339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121606357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53921 + ... + 56130.

It is an arithmetic number, because the mean of its divisors is an integer number (10399914).

Almost surely, 2^121606355 is an apocalyptic number.

121606355 is a deficient number, since it is larger than the sum of its proper divisors (44792269).

121606355 is a wasteful number, since it uses less digits than its factorization.

121606355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110086.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 121606355 is about 11027.5271480056. The cubic root of 121606355 is about 495.4335622539.

The spelling of 121606355 in words is "one hundred twenty-one million, six hundred six thousand, three hundred fifty-five".