121244412111 has 16 divisors (see below), whose sum is σ = 166064788608. Its totient is φ = 78627780000.

The previous prime is 121244412109. The next prime is 121244412221. The reversal of 121244412111 is 111214442121.

It is not a de Polignac number, because 121244412111 - 2¹ = 121244412109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121244412011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398836 + ... + 633686.

It is an arithmetic number, because the mean of its divisors is an integer number (10379049288).

Almost surely, 2^121244412111 is an apocalyptic number.

121244412111 is a deficient number, since it is larger than the sum of its proper divisors (44820376497).

121244412111 is a wasteful number, since it uses less digits than its factorization.

121244412111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239542.

The product of its digits is 512, while the sum is 24.

Adding to 121244412111 its reverse (111214442121), we get a palindrome (232458854232).

The spelling of 121244412111 in words is "one hundred twenty-one billion, two hundred forty-four million, four hundred twelve thousand, one hundred eleven".