121111212108 has 24 divisors (see below), whose sum is σ = 282678580800. Its totient is φ = 40358153680.

The previous prime is 121111212107. The next prime is 121111212121. The reversal of 121111212108 is 801212111121.

It is not an unprimeable number, because it can be changed into a prime (121111212107) 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, 1490058 + ... + 1569233.

It is an arithmetic number, because the mean of its divisors is an integer number (11778274200).

Almost surely, 2^121111212108 is an apocalyptic number.

It is an amenable number.

121111212108 is an abundant number, since it is smaller than the sum of its proper divisors (161567368692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121111212108 is a wasteful number, since it uses less digits than its factorization.

121111212108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3062597 (or 3062595 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 21.

Adding to 121111212108 its reverse (801212111121), we get a palindrome (922323323229).

The spelling of 121111212108 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred twelve thousand, one hundred eight".