121552041251 has 16 divisors (see below), whose sum is σ = 128268645120. Its totient is φ = 115068942240.

The previous prime is 121552041181. The next prime is 121552041269. The reversal of 121552041251 is 152140255121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121552041251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121552041451) 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 in 15 ways as a sum of consecutive naturals, for example, 157280 + ... + 517533.

It is an arithmetic number, because the mean of its divisors is an integer number (8016790320).

Almost surely, 2^121552041251 is an apocalyptic number.

121552041251 is a deficient number, since it is larger than the sum of its proper divisors (6716603869).

121552041251 is an equidigital number, since it uses as much as digits as its factorization.

121552041251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674986.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 121552041251 its reverse (152140255121), we get a palindrome (273692296372).

The spelling of 121552041251 in words is "one hundred twenty-one billion, five hundred fifty-two million, forty-one thousand, two hundred fifty-one".