121011110211111 has 8 divisors (see below), whose sum is σ = 161349750874224. Its totient is φ = 80673271511040.

The previous prime is 121011110211091. The next prime is 121011110211133. The reversal of 121011110211111 is 111112011110121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121011110211111 - 2¹³ = 121011110202919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011110211181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200138586 + ... + 200742311.

It is an arithmetic number, because the mean of its divisors is an integer number (20168718859278).

Almost surely, 2^{121011110211111} is an apocalyptic number.

121011110211111 is a deficient number, since it is larger than the sum of its proper divisors (40338640663113).

121011110211111 is a wasteful number, since it uses less digits than its factorization.

121011110211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400981521.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 121011110211111 its reverse (111112011110121), we get a palindrome (232123121321232).

The spelling of 121011110211111 in words is "one hundred twenty-one trillion, eleven billion, one hundred ten million, two hundred eleven thousand, one hundred eleven".