121651147 has 4 divisors (see below), whose sum is σ = 122288256. Its totient is φ = 121014040.

The previous prime is 121651093. The next prime is 121651169. The reversal of 121651147 is 741156121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121651147 - 2¹⁵ = 121618379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121651247) 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, 318268 + ... + 318649.

It is an arithmetic number, because the mean of its divisors is an integer number (30572064).

Almost surely, 2^121651147 is an apocalyptic number.

121651147 is a deficient number, since it is larger than the sum of its proper divisors (637109).

121651147 is an equidigital number, since it uses as much as digits as its factorization.

121651147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637108.

The product of its digits is 1680, while the sum is 28.

The square root of 121651147 is about 11029.5578787184. The cubic root of 121651147 is about 495.4943834614.

It can be divided in two parts, 121 and 651147, that multiplied together give a palindrome (78788787).

The spelling of 121651147 in words is "one hundred twenty-one million, six hundred fifty-one thousand, one hundred forty-seven".