121930147 has 4 divisors (see below), whose sum is σ = 121980496. Its totient is φ = 121879800.

The previous prime is 121930141. The next prime is 121930231. The reversal of 121930147 is 741039121.

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 121930147 - 2⁷ = 121930019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121930141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21348 + ... + 26449.

It is an arithmetic number, because the mean of its divisors is an integer number (30495124).

Almost surely, 2^121930147 is an apocalyptic number.

121930147 is a deficient number, since it is larger than the sum of its proper divisors (50349).

121930147 is an equidigital number, since it uses as much as digits as its factorization.

121930147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50348.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 121930147 is about 11042.1984676965. The cubic root of 121930147 is about 495.8728903278.

Adding to 121930147 its reverse (741039121), we get a palindrome (862969268).

The spelling of 121930147 in words is "one hundred twenty-one million, nine hundred thirty thousand, one hundred forty-seven".