121002012220 has 96 divisors (see below), whose sum is σ = 264202505280. Its totient is φ = 46495088640.

The previous prime is 121002012199. The next prime is 121002012233. The reversal of 121002012220 is 22210200121.

It is a happy number.

It is a super-2 number, since 2×121002012220² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121002012220.

It is a congruent number.

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, 183058690 + ... + 183059350.

It is an arithmetic number, because the mean of its divisors is an integer number (2752109430).

Almost surely, 2^121002012220 is an apocalyptic number.

121002012220 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 121002012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132101252640).

121002012220 is an abundant number, since it is smaller than the sum of its proper divisors (143200493060).

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

121002012220 is a wasteful number, since it uses less digits than its factorization.

121002012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823 (or 1821 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121002012220 its reverse (22210200121), we get a palindrome (143212212341).

The spelling of 121002012220 in words is "one hundred twenty-one billion, two million, twelve thousand, two hundred twenty".