121321123118 has 64 divisors (see below), whose sum is σ = 210040750080. Its totient is φ = 52061087232.

The previous prime is 121321123117. The next prime is 121321123129. The reversal of 121321123118 is 811321123121.

It is a happy number.

121321123118 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121321123118² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321123117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13411505 + ... + 13420547.

It is an arithmetic number, because the mean of its divisors is an integer number (3281886720).

Almost surely, 2^121321123118 is an apocalyptic number.

121321123118 is a deficient number, since it is larger than the sum of its proper divisors (88719626962).

121321123118 is a wasteful number, since it uses less digits than its factorization.

121321123118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9441.

The product of its digits is 576, while the sum is 26.

Adding to 121321123118 its reverse (811321123121), we get a palindrome (932642246239).

The spelling of 121321123118 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred twenty-three thousand, one hundred eighteen".