121403047 has 4 divisors (see below), whose sum is σ = 121446280. Its totient is φ = 121359816.

The previous prime is 121403041. The next prime is 121403053. The reversal of 121403047 is 740304121.

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

It is an interprime number because it is at equal distance from previous prime (121403041) and next prime (121403053).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121403047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121403041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17088 + ... + 23125.

It is an arithmetic number, because the mean of its divisors is an integer number (30361570).

Almost surely, 2^121403047 is an apocalyptic number.

121403047 is a deficient number, since it is larger than the sum of its proper divisors (43233).

121403047 is an equidigital number, since it uses as much as digits as its factorization.

121403047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43232.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 121403047 is about 11018.3050874443. The cubic root of 121403047 is about 495.1573108149.

Adding to 121403047 its reverse (740304121), we get a palindrome (861707168).

The spelling of 121403047 in words is "one hundred twenty-one million, four hundred three thousand, forty-seven".