121213111113 has 24 divisors (see below), whose sum is σ = 186125422080. Its totient is φ = 75797661600.

The previous prime is 121213111069. The next prime is 121213111127. The reversal of 121213111113 is 311111312121.

It is not a de Polignac number, because 121213111113 - 2¹⁴ = 121213094729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121213111183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3491881 + ... + 3526422.

It is an arithmetic number, because the mean of its divisors is an integer number (7755225920).

Almost surely, 2^121213111113 is an apocalyptic number.

It is an amenable number.

121213111113 is a deficient number, since it is larger than the sum of its proper divisors (64912310967).

121213111113 is a wasteful number, since it uses less digits than its factorization.

121213111113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7018429 (or 7018426 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

Adding to 121213111113 its reverse (311111312121), we get a palindrome (432324423234).

The spelling of 121213111113 in words is "one hundred twenty-one billion, two hundred thirteen million, one hundred eleven thousand, one hundred thirteen".