121947121 has 8 divisors (see below), whose sum is σ = 123177600. Its totient is φ = 120723120.

The previous prime is 121947109. The next prime is 121947131. The reversal of 121947121 is 121749121.

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

It is a cyclic number.

It is not a de Polignac number, because 121947121 - 2¹¹ = 121945073 is a prime.

It is a super-2 number, since 2×121947121² = 29742200640377282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121947121.

It is not an unprimeable number, because it can be changed into a prime (121947101) 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, 41850 + ... + 44668.

It is an arithmetic number, because the mean of its divisors is an integer number (15397200).

Almost surely, 2^121947121 is an apocalyptic number.

It is an amenable number.

121947121 is a deficient number, since it is larger than the sum of its proper divisors (1230479).

121947121 is a wasteful number, since it uses less digits than its factorization.

121947121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3239.

The product of its digits is 1008, while the sum is 28.

The square root of 121947121 is about 11042.9670378934. The cubic root of 121947121 is about 495.8958995564.

The spelling of 121947121 in words is "one hundred twenty-one million, nine hundred forty-seven thousand, one hundred twenty-one".