121651606 has 8 divisors (see below), whose sum is σ = 184676184. Its totient is φ = 60092880.

The previous prime is 121651591. The next prime is 121651667. The reversal of 121651606 is 606156121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×121651606² = 29598226484758472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366255 + ... + 366586.

It is an arithmetic number, because the mean of its divisors is an integer number (23084523).

Almost surely, 2^121651606 is an apocalyptic number.

121651606 is a deficient number, since it is larger than the sum of its proper divisors (63024578).

121651606 is an equidigital number, since it uses as much as digits as its factorization.

121651606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732926.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 121651606 is about 11029.5786864232. The cubic root of 121651606 is about 495.4950066413.

The spelling of 121651606 in words is "one hundred twenty-one million, six hundred fifty-one thousand, six hundred six".