121859001811 has 2 divisors, whose sum is σ = 121859001812. Its totient is φ = 121859001810.

The previous prime is 121859001779. The next prime is 121859001839. The reversal of 121859001811 is 118100958121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121859001811 - 2⁵ = 121859001779 is a prime.

It is not a weakly prime, because it can be changed into another prime (121859001881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60929500905 + 60929500906.

It is an arithmetic number, because the mean of its divisors is an integer number (60929500906).

Almost surely, 2^121859001811 is an apocalyptic number.

121859001811 is a deficient number, since it is larger than the sum of its proper divisors (1).

121859001811 is an equidigital number, since it uses as much as digits as its factorization.

121859001811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 37.

Adding to 121859001811 its reverse (118100958121), we get a palindrome (239959959932).

The spelling of 121859001811 in words is "one hundred twenty-one billion, eight hundred fifty-nine million, one thousand, eight hundred eleven".