121541047 has 2 divisors, whose sum is σ = 121541048. Its totient is φ = 121541046.

The previous prime is 121541033. The next prime is 121541087. The reversal of 121541047 is 740145121.

It is a weak prime.

It is an emirp because it is prime and its reverse (740145121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121541047 - 2¹¹ = 121538999 is a prime.

It is a super-2 number, since 2×121541047² = 29544452211712418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121541027) 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 as a sum of consecutive naturals, namely, 60770523 + 60770524.

It is an arithmetic number, because the mean of its divisors is an integer number (60770524).

Almost surely, 2^121541047 is an apocalyptic number.

121541047 is a deficient number, since it is larger than the sum of its proper divisors (1).

121541047 is an equidigital number, since it uses as much as digits as its factorization.

121541047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 121541047 is about 11024.5656150254. The cubic root of 121541047 is about 495.3448564486.

Adding to 121541047 its reverse (740145121), we get a palindrome (861686168).

The spelling of 121541047 in words is "one hundred twenty-one million, five hundred forty-one thousand, forty-seven".