121972606 has 16 divisors (see below), whose sum is σ = 209332224. Its totient is φ = 52214904.

The previous prime is 121972601. The next prime is 121972649. The reversal of 121972606 is 606279121.

It is a super-2 number, since 2×121972606² = 29754633228862472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121972601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9331 + ... + 18193.

It is an arithmetic number, because the mean of its divisors is an integer number (13083264).

Almost surely, 2^121972606 is an apocalyptic number.

121972606 is a deficient number, since it is larger than the sum of its proper divisors (87359618).

121972606 is an equidigital number, since it uses as much as digits as its factorization.

121972606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9855.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 121972606 is about 11044.1208794544. The cubic root of 121972606 is about 495.9304419237.

The spelling of 121972606 in words is "one hundred twenty-one million, nine hundred seventy-two thousand, six hundred six".