121532523251 has 2 divisors, whose sum is σ = 121532523252. Its totient is φ = 121532523250.

The previous prime is 121532523239. The next prime is 121532523263. The reversal of 121532523251 is 152325235121.

It is a balanced prime because it is at equal distance from previous prime (121532523239) and next prime (121532523263).

It is an emirp because it is prime and its reverse (152325235121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121532523251 is a prime.

It is not a weakly prime, because it can be changed into another prime (121532523221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60766261625 + 60766261626.

It is an arithmetic number, because the mean of its divisors is an integer number (60766261626).

Almost surely, 2^121532523251 is an apocalyptic number.

121532523251 is a deficient number, since it is larger than the sum of its proper divisors (1).

121532523251 is an equidigital number, since it uses as much as digits as its factorization.

121532523251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 32.

Adding to 121532523251 its reverse (152325235121), we get a palindrome (273857758372).

The spelling of 121532523251 in words is "one hundred twenty-one billion, five hundred thirty-two million, five hundred twenty-three thousand, two hundred fifty-one".