121201122220002 has 48 divisors (see below), whose sum is σ = 294217957642752. Its totient is φ = 35734974608160.

The previous prime is 121201122219959. The next prime is 121201122220007. The reversal of 121201122220002 is 200022221102121.

It is a happy number.

121201122220002 is a `hidden beast` number, since 121 + 201 + 122 + 220 + 0 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121201122220007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8271977538 + ... + 8271992189.

It is an arithmetic number, because the mean of its divisors is an integer number (6129540784224).

Almost surely, 2^{121201122220002} is an apocalyptic number.

121201122220002 is an abundant number, since it is smaller than the sum of its proper divisors (173016835422750).

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

121201122220002 is a wasteful number, since it uses less digits than its factorization.

121201122220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16543969783 (or 16543969780 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121201122220002 its reverse (200022221102121), we get a palindrome (321223343322123).

The spelling of 121201122220002 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred twenty-two million, two hundred twenty thousand, two".