121451551601 has 2 divisors, whose sum is σ = 121451551602. Its totient is φ = 121451551600.

The previous prime is 121451551553. The next prime is 121451551603. The reversal of 121451551601 is 106155154121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118721593600 + 2729958001 = 344560^2 + 52249^2 .

It is a cyclic number.

It is not a de Polignac number, because 121451551601 - 2³⁰ = 120377809777 is a prime.

Together with 121451551603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121451551603) 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, 60725775800 + 60725775801.

It is an arithmetic number, because the mean of its divisors is an integer number (60725775801).

Almost surely, 2^121451551601 is an apocalyptic number.

It is an amenable number.

121451551601 is a deficient number, since it is larger than the sum of its proper divisors (1).

121451551601 is an equidigital number, since it uses as much as digits as its factorization.

121451551601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 32.

The spelling of 121451551601 in words is "one hundred twenty-one billion, four hundred fifty-one million, five hundred fifty-one thousand, six hundred one".