121101116851 has 16 divisors (see below), whose sum is σ = 143017555968. Its totient is φ = 101091232800.

The previous prime is 121101116821. The next prime is 121101116863. The reversal of 121101116851 is 158611101121.

It is a cyclic number.

It is not a de Polignac number, because 121101116851 - 2¹⁹ = 121100592563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121101116821) 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 15 ways as a sum of consecutive naturals, for example, 2189601 + ... + 2244226.

It is an arithmetic number, because the mean of its divisors is an integer number (8938597248).

Almost surely, 2^121101116851 is an apocalyptic number.

121101116851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121101116851 is a deficient number, since it is larger than the sum of its proper divisors (21916439117).

121101116851 is a wasteful number, since it uses less digits than its factorization.

121101116851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434042.

The product of its (nonzero) digits is 480, while the sum is 28.

Adding to 121101116851 its reverse (158611101121), we get a palindrome (279712217972).

The spelling of 121101116851 in words is "one hundred twenty-one billion, one hundred one million, one hundred sixteen thousand, eight hundred fifty-one".