101121247 has 2 divisors, whose sum is σ = 101121248. Its totient is φ = 101121246.

The previous prime is 101121203. The next prime is 101121257. The reversal of 101121247 is 742121101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101121247 - 2¹¹ = 101119199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101121257) 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, 50560623 + 50560624.

It is an arithmetic number, because the mean of its divisors is an integer number (50560624).

Almost surely, 2^101121247 is an apocalyptic number.

101121247 is a deficient number, since it is larger than the sum of its proper divisors (1).

101121247 is an equidigital number, since it uses as much as digits as its factorization.

101121247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 101121247 is about 10055.9060755359. The cubic root of 101121247 is about 465.8872288779.

Adding to 101121247 its reverse (742121101), we get a palindrome (843242348).

The spelling of 101121247 in words is "one hundred one million, one hundred twenty-one thousand, two hundred forty-seven".