121907047 has 4 divisors (see below), whose sum is σ = 121935240. Its totient is φ = 121878856.

The previous prime is 121907041. The next prime is 121907053. The reversal of 121907047 is 740709121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740709121 = 4549 ⋅162829.

It is an interprime number because it is at equal distance from previous prime (121907041) and next prime (121907053).

It is a cyclic number.

It is not a de Polignac number, because 121907047 - 2¹⁹ = 121382759 is a prime.

It is a super-2 number, since 2×121907047² = 29722656216520418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121907041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6097 + ... + 16762.

It is an arithmetic number, because the mean of its divisors is an integer number (30483810).

Almost surely, 2^121907047 is an apocalyptic number.

121907047 is a deficient number, since it is larger than the sum of its proper divisors (28193).

121907047 is an equidigital number, since it uses as much as digits as its factorization.

121907047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28192.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 121907047 is about 11041.1524307927. The cubic root of 121907047 is about 495.8415735247.

The spelling of 121907047 in words is "one hundred twenty-one million, nine hundred seven thousand, forty-seven".