121787844801 has 96 divisors (see below), whose sum is σ = 200467507968. Its totient is φ = 64370972160.

The previous prime is 121787844769. The next prime is 121787844803. The reversal of 121787844801 is 108448787121.

It is a happy number.

It is not a de Polignac number, because 121787844801 - 2⁵ = 121787844769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121787844803) 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 95 ways as a sum of consecutive naturals, for example, 74396155 + ... + 74397791.

It is an arithmetic number, because the mean of its divisors is an integer number (2088203208).

Almost surely, 2^121787844801 is an apocalyptic number.

It is an amenable number.

121787844801 is a deficient number, since it is larger than the sum of its proper divisors (78679663167).

121787844801 is a wasteful number, since it uses less digits than its factorization.

121787844801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911 (or 1888 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 51.

The spelling of 121787844801 in words is "one hundred twenty-one billion, seven hundred eighty-seven million, eight hundred forty-four thousand, eight hundred one".