120121122222001 has 4 divisors (see below), whose sum is σ = 120149879976292. Its totient is φ = 120092364467712.

The previous prime is 120121122221963. The next prime is 120121122222019. The reversal of 120121122222001 is 100222221121021.

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 100702328853025 + 19418793368976 = 10035055^2 + 4406676^2 .

It is a cyclic number.

It is not a de Polignac number, because 120121122222001 - 2²¹ = 120121120124849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120121122222001.

It is not an unprimeable number, because it can be changed into a prime (120121122222061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14378870880 + ... + 14378879233.

It is an arithmetic number, because the mean of its divisors is an integer number (30037469994073).

Almost surely, 2^{120121122222001} is an apocalyptic number.

It is an amenable number.

120121122222001 is a deficient number, since it is larger than the sum of its proper divisors (28757754291).

120121122222001 is an equidigital number, since it uses as much as digits as its factorization.

120121122222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28757754290.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 120121122222001 its reverse (100222221121021), we get a palindrome (220343343343022).

The spelling of 120121122222001 in words is "one hundred twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, one".