121853801 has 2 divisors, whose sum is σ = 121853802. Its totient is φ = 121853800.

The previous prime is 121853789. The next prime is 121853803. The reversal of 121853801 is 108358121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113443801 + 8410000 = 10651^2 + 2900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121853801 is a prime.

Together with 121853803, 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 (121853803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60926900 + 60926901.

It is an arithmetic number, because the mean of its divisors is an integer number (60926901).

Almost surely, 2^121853801 is an apocalyptic number.

It is an amenable number.

121853801 is a deficient number, since it is larger than the sum of its proper divisors (1).

121853801 is an equidigital number, since it uses as much as digits as its factorization.

121853801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 121853801 is about 11038.7409155211. The cubic root of 121853801 is about 495.7693725435.

The spelling of 121853801 in words is "one hundred twenty-one million, eight hundred fifty-three thousand, eight hundred one".