1220100002001 has 128 divisors (see below), whose sum is σ = 2027047680000. Its totient is φ = 720801607680.

The previous prime is 1220100001987. The next prime is 1220100002083. The reversal of 1220100002001 is 1002000010221.

It is not a de Polignac number, because 1220100002001 - 2⁶ = 1220100001937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1220100002501) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1384903081 + ... + 1384903961.

It is an arithmetic number, because the mean of its divisors is an integer number (15836310000).

Almost surely, 2^{1220100002001} is an apocalyptic number.

It is an amenable number.

1220100002001 is a deficient number, since it is larger than the sum of its proper divisors (806947677999).

1220100002001 is a wasteful number, since it uses less digits than its factorization.

1220100002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724 (or 1718 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1220100002001 its reverse (1002000010221), we get a palindrome (2222100012222).

The spelling of 1220100002001 in words is "one trillion, two hundred twenty billion, one hundred million, two thousand, one".