121381247 has 8 divisors (see below), whose sum is σ = 131184144. Its totient is φ = 111644928.

The previous prime is 121381229. The next prime is 121381259. The reversal of 121381247 is 742183121.

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 121381247 - 2⁸ = 121380991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121381297) 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, 12818 + ... + 20175.

It is an arithmetic number, because the mean of its divisors is an integer number (16398018).

Almost surely, 2^121381247 is an apocalyptic number.

121381247 is a deficient number, since it is larger than the sum of its proper divisors (9802897).

121381247 is a wasteful number, since it uses less digits than its factorization.

121381247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33289.

The product of its digits is 2688, while the sum is 29.

The square root of 121381247 is about 11017.3157801708. The cubic root of 121381247 is about 495.1276710439.

The spelling of 121381247 in words is "one hundred twenty-one million, three hundred eighty-one thousand, two hundred forty-seven".