121320012011 has 4 divisors (see below), whose sum is σ = 132349104024. Its totient is φ = 110290920000.

The previous prime is 121320011987. The next prime is 121320012017. The reversal of 121320012011 is 110210023121.

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 121320012011 - 2²⁶ = 121252903147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121320012017) 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 in 3 ways as a sum of consecutive naturals, for example, 5514545990 + ... + 5514546011.

It is an arithmetic number, because the mean of its divisors is an integer number (33087276006).

Almost surely, 2^121320012011 is an apocalyptic number.

121320012011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121320012011 is a deficient number, since it is larger than the sum of its proper divisors (11029092013).

121320012011 is a wasteful number, since it uses less digits than its factorization.

121320012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11029092012.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 121320012011 its reverse (110210023121), we get a palindrome (231530035132).

The spelling of 121320012011 in words is "one hundred twenty-one billion, three hundred twenty million, twelve thousand, eleven".