121121002002 has 64 divisors (see below), whose sum is σ = 325248021504. Its totient is φ = 29039999040.

The previous prime is 121121001997. The next prime is 121121002003. The reversal of 121121002002 is 200200121121.

It is not an unprimeable number, because it can be changed into a prime (121121002003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10077328 + ... + 10089339.

It is an arithmetic number, because the mean of its divisors is an integer number (5082000336).

Almost surely, 2^121121002002 is an apocalyptic number.

121121002002 is an abundant number, since it is smaller than the sum of its proper divisors (204127019502).

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

121121002002 is a wasteful number, since it uses less digits than its factorization.

121121002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20166703.

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

Adding to 121121002002 its reverse (200200121121), we get a palindrome (321321123123).

The spelling of 121121002002 in words is "one hundred twenty-one billion, one hundred twenty-one million, two thousand, two".