121321223011 has 4 divisors (see below), whose sum is σ = 121322996032. Its totient is φ = 121319449992.

The previous prime is 121321222991. The next prime is 121321223017. The reversal of 121321223011 is 110322123121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121321223011 is a prime.

It is a super-2 number, since 2×121321223011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121321223011.

It is not an unprimeable number, because it can be changed into a prime (121321223017) 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, 779571 + ... + 922156.

It is an arithmetic number, because the mean of its divisors is an integer number (30330749008).

Almost surely, 2^121321223011 is an apocalyptic number.

121321223011 is a deficient number, since it is larger than the sum of its proper divisors (1773021).

121321223011 is an equidigital number, since it uses as much as digits as its factorization.

121321223011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773020.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121321223011 its reverse (110322123121), we get a palindrome (231643346132).

The spelling of 121321223011 in words is "one hundred twenty-one billion, three hundred twenty-one million, two hundred twenty-three thousand, eleven".