121145747 has 2 divisors, whose sum is σ = 121145748. Its totient is φ = 121145746.

The previous prime is 121145719. The next prime is 121145779. The reversal of 121145747 is 747541121.

It is an a-pointer prime, because the next prime (121145779) can be obtained adding 121145747 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121145747 - 2²⁴ = 104368531 is a prime.

It is a super-3 number, since 3×121145747³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (121145797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60572873 + 60572874.

It is an arithmetic number, because the mean of its divisors is an integer number (60572874).

Almost surely, 2^121145747 is an apocalyptic number.

121145747 is a deficient number, since it is larger than the sum of its proper divisors (1).

121145747 is an equidigital number, since it uses as much as digits as its factorization.

121145747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7840, while the sum is 32.

The square root of 121145747 is about 11006.6228698907. The cubic root of 121145747 is about 494.8072534606.

Adding to 121145747 its reverse (747541121), we get a palindrome (868686868).

The spelling of 121145747 in words is "one hundred twenty-one million, one hundred forty-five thousand, seven hundred forty-seven".