1220001202001 has 32 divisors (see below), whose sum is σ = 1323620352000. Its totient is φ = 1120817086272.

The previous prime is 1220001201997. The next prime is 1220001202003. The reversal of 1220001202001 is 1002021000221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1220001202001 - 2² = 1220001201997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220001202003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50320040 + ... + 50344278.

It is an arithmetic number, because the mean of its divisors is an integer number (41363136000).

Almost surely, 2^{1220001202001} is an apocalyptic number.

It is an amenable number.

1220001202001 is a deficient number, since it is larger than the sum of its proper divisors (103619149999).

1220001202001 is a wasteful number, since it uses less digits than its factorization.

1220001202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24821.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1220001202001 its reverse (1002021000221), we get a palindrome (2222022202222).

The spelling of 1220001202001 in words is "one trillion, two hundred twenty billion, one million, two hundred two thousand, one".