121002002010 has 128 divisors (see below), whose sum is σ = 333041587200. Its totient is φ = 31246585920.

The previous prime is 121002001937. The next prime is 121002002027. The reversal of 121002002010 is 10200200121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121002001983 and 121002002001.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1010625 + ... + 1123995.

It is an arithmetic number, because the mean of its divisors is an integer number (2601887400).

Almost surely, 2^121002002010 is an apocalyptic number.

121002002010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121002002010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166520793600).

121002002010 is an abundant number, since it is smaller than the sum of its proper divisors (212039585190).

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

121002002010 is a wasteful number, since it uses less digits than its factorization.

121002002010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113513 (or 113507 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 121002002010 its reverse (10200200121), we get a palindrome (131202202131).

The spelling of 121002002010 in words is "one hundred twenty-one billion, two million, two thousand, ten".