121111010000 has 200 divisors, whose sum is σ = 301967339520. Its totient is φ = 47017152000.

The previous prime is 121111009979. The next prime is 121111010021. The reversal of 121111010000 is 10111121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121111009979) and next prime (121111010021).

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 121111010000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 59688986 + ... + 59691014.

Almost surely, 2^121111010000 is an apocalyptic number.

121111010000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121111010000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150983669760).

121111010000 is an abundant number, since it is smaller than the sum of its proper divisors (180856329520).

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

121111010000 is a wasteful number, since it uses less digits than its factorization.

121111010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231 (or 2210 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 121111010000 its reverse (10111121), we get a palindrome (121121121121).

The spelling of 121111010000 in words is "one hundred twenty-one billion, one hundred eleven million, ten thousand".