121331003111 has 4 divisors (see below), whose sum is σ = 127716845400. Its totient is φ = 114945160824.

The previous prime is 121331003099. The next prime is 121331003113. The reversal of 121331003111 is 111300133121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111300133121 = 167 ⋅666467863.

It is a cyclic number.

It is not a de Polignac number, because 121331003111 - 2⁶ = 121331003047 is a prime.

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 121331003111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331003113) 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, 3192921116 + ... + 3192921153.

It is an arithmetic number, because the mean of its divisors is an integer number (31929211350).

Almost surely, 2^121331003111 is an apocalyptic number.

121331003111 is a deficient number, since it is larger than the sum of its proper divisors (6385842289).

121331003111 is an equidigital number, since it uses as much as digits as its factorization.

121331003111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6385842288.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 121331003111 its reverse (111300133121), we get a palindrome (232631136232).

The spelling of 121331003111 in words is "one hundred twenty-one billion, three hundred thirty-one million, three thousand, one hundred eleven".