121123200011 has 16 divisors (see below), whose sum is σ = 132761864160. Its totient is φ = 109589959680.

The previous prime is 121123199999. The next prime is 121123200043. The reversal of 121123200011 is 110002321121.

It is a cyclic number.

It is not a de Polignac number, because 121123200011 - 2²⁶ = 121056091147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121123200811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2929595 + ... + 2970651.

It is an arithmetic number, because the mean of its divisors is an integer number (8297616510).

Almost surely, 2^121123200011 is an apocalyptic number.

121123200011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121123200011 is a deficient number, since it is larger than the sum of its proper divisors (11638664149).

121123200011 is a wasteful number, since it uses less digits than its factorization.

121123200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42334.

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

Adding to 121123200011 its reverse (110002321121), we get a palindrome (231125521132).

It can be divided in two parts, 12112 and 3200011, that added together give a palindrome (3212123).

The spelling of 121123200011 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred thousand, eleven".