121111102002 has 64 divisors (see below), whose sum is σ = 273357619200. Its totient is φ = 35439465600.

The previous prime is 121111101983. The next prime is 121111102019. The reversal of 121111102002 is 200201111121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 883374 + ... + 1011222.

It is an arithmetic number, because the mean of its divisors is an integer number (4271212800).

Almost surely, 2^121111102002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121111102002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136678809600).

121111102002 is an abundant number, since it is smaller than the sum of its proper divisors (152246517198).

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

121111102002 is a wasteful number, since it uses less digits than its factorization.

121111102002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128359.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121111102002 its reverse (200201111121), we get a palindrome (321312213123).

The spelling of 121111102002 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred two thousand, two".