121984511 has 4 divisors (see below), whose sum is σ = 133074024. Its totient is φ = 110895000.

The previous prime is 121984501. The next prime is 121984529. The reversal of 121984511 is 115489121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121984511 - 2¹⁴ = 121968127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121984501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5544740 + ... + 5544761.

It is an arithmetic number, because the mean of its divisors is an integer number (33268506).

Almost surely, 2^121984511 is an apocalyptic number.

121984511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121984511 is a deficient number, since it is larger than the sum of its proper divisors (11089513).

121984511 is a wasteful number, since it uses less digits than its factorization.

121984511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11089512.

The product of its digits is 2880, while the sum is 32.

The square root of 121984511 is about 11044.6598408462. The cubic root of 121984511 is about 495.9465763111.

The spelling of 121984511 in words is "one hundred twenty-one million, nine hundred eighty-four thousand, five hundred eleven".