121221020002 has 8 divisors (see below), whose sum is σ = 182241986256. Its totient is φ = 60473691252.

The previous prime is 121221019999. The next prime is 121221020009. The reversal of 121221020002 is 200020122121.

It is a happy number.

121221020002 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (121221020009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68408268 + ... + 68410039.

It is an arithmetic number, because the mean of its divisors is an integer number (22780248282).

Almost surely, 2^121221020002 is an apocalyptic number.

121221020002 is a deficient number, since it is larger than the sum of its proper divisors (61020966254).

121221020002 is a wasteful number, since it uses less digits than its factorization.

121221020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136818752.

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

Adding to 121221020002 its reverse (200020122121), we get a palindrome (321241142123).

The spelling of 121221020002 in words is "one hundred twenty-one billion, two hundred twenty-one million, twenty thousand, two".