121155231047 has 2 divisors, whose sum is σ = 121155231048. Its totient is φ = 121155231046.

The previous prime is 121155231007. The next prime is 121155231103. The reversal of 121155231047 is 740132551121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121155231047 - 2²⁸ = 120886795591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121155231007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60577615523 + 60577615524.

It is an arithmetic number, because the mean of its divisors is an integer number (60577615524).

Almost surely, 2^121155231047 is an apocalyptic number.

121155231047 is a deficient number, since it is larger than the sum of its proper divisors (1).

121155231047 is an equidigital number, since it uses as much as digits as its factorization.

121155231047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 32.

Adding to 121155231047 its reverse (740132551121), we get a palindrome (861287782168).

The spelling of 121155231047 in words is "one hundred twenty-one billion, one hundred fifty-five million, two hundred thirty-one thousand, forty-seven".