121120012002 has 128 divisors (see below), whose sum is σ = 277873182720. Its totient is φ = 34856640000.

The previous prime is 121120012001. The next prime is 121120012007. The reversal of 121120012002 is 200210021121.

It is not an unprimeable number, because it can be changed into a prime (121120012001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81671553 + ... + 81673035.

It is an arithmetic number, because the mean of its divisors is an integer number (2170884240).

Almost surely, 2^121120012002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121120012002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138936591360).

121120012002 is an abundant number, since it is smaller than the sum of its proper divisors (156753170718).

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

121120012002 is a wasteful number, since it uses less digits than its factorization.

121120012002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121120012002 its reverse (200210021121), we get a palindrome (321330033123).

The spelling of 121120012002 in words is "one hundred twenty-one billion, one hundred twenty million, twelve thousand, two".