121221210002 has 8 divisors (see below), whose sum is σ = 182836411212. Its totient is φ = 60275739600.

The previous prime is 121221209999. The next prime is 121221210017. The reversal of 121221210002 is 200012122121.

It can be written as a sum of positive squares in 2 ways, for example, as 103425916801 + 17795293201 = 321599^2 + 133399^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167432249 + ... + 167432972.

Almost surely, 2^121221210002 is an apocalyptic number.

121221210002 is a deficient number, since it is larger than the sum of its proper divisors (61615201210).

121221210002 is a wasteful number, since it uses less digits than its factorization.

121221210002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334865404.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121221210002 its reverse (200012122121), we get a palindrome (321233332123).

The spelling of 121221210002 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred ten thousand, two".