121331047 has 2 divisors, whose sum is σ = 121331048. Its totient is φ = 121331046.

The previous prime is 121331039. The next prime is 121331059. The reversal of 121331047 is 740133121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121331047 - 2³ = 121331039 is a prime.

It is a super-2 number, since 2×121331047² = 29442445932232418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121331027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60665523 + 60665524.

It is an arithmetic number, because the mean of its divisors is an integer number (60665524).

Almost surely, 2^121331047 is an apocalyptic number.

121331047 is a deficient number, since it is larger than the sum of its proper divisors (1).

121331047 is an equidigital number, since it uses as much as digits as its factorization.

121331047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 121331047 is about 11015.0373126921. The cubic root of 121331047 is about 495.0594044953.

Adding to 121331047 its reverse (740133121), we get a palindrome (861464168).

The spelling of 121331047 in words is "one hundred twenty-one million, three hundred thirty-one thousand, forty-seven".