121201122220001 has 4 divisors (see below), whose sum is σ = 125380471262100. Its totient is φ = 117021773177904.

The previous prime is 121201122219959. The next prime is 121201122220007. The reversal of 121201122220001 is 100022221102121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39668330958400 + 81532791261601 = 6298280^2 + 9029551^2 .

It is a cyclic number.

It is not a de Polignac number, because 121201122220001 - 2³⁸ = 120926244313057 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 2089674521006 + ... + 2089674521063.

It is an arithmetic number, because the mean of its divisors is an integer number (31345117815525).

Almost surely, 2^{121201122220001} is an apocalyptic number.

It is an amenable number.

121201122220001 is a deficient number, since it is larger than the sum of its proper divisors (4179349042099).

121201122220001 is an equidigital number, since it uses as much as digits as its factorization.

121201122220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179349042098.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121201122220001 its reverse (100022221102121), we get a palindrome (221223343322122).

The spelling of 121201122220001 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred twenty-two million, two hundred twenty thousand, one".