121111010011 has 4 divisors (see below), whose sum is σ = 122310129024. Its totient is φ = 119911891000.

The previous prime is 121111009979. The next prime is 121111010021. The reversal of 121111010011 is 110010111121.

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

It is a cyclic number.

It is not a de Polignac number, because 121111010011 - 2⁵ = 121111009979 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 121111010011.

It is not an unprimeable number, because it can be changed into a prime (121111010021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599559355 + ... + 599559556.

It is an arithmetic number, because the mean of its divisors is an integer number (30577532256).

Almost surely, 2^121111010011 is an apocalyptic number.

121111010011 is a deficient number, since it is larger than the sum of its proper divisors (1199119013).

121111010011 is a wasteful number, since it uses less digits than its factorization.

121111010011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199119012.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 121111010011 its reverse (110010111121), we get a palindrome (231121121132).

The spelling of 121111010011 in words is "one hundred twenty-one billion, one hundred eleven million, ten thousand, eleven".