1220011010001 has 80 divisors (see below), whose sum is σ = 2153372221440. Its totient is φ = 673611435360.

The previous prime is 1220011009963. The next prime is 1220011010041. The reversal of 1220011010001 is 1000101100221.

It is a happy number.

It is not a de Polignac number, because 1220011010001 - 2³⁷ = 1082572056529 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 (1220011010041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11318680 + ... + 11425958.

It is an arithmetic number, because the mean of its divisors is an integer number (26917152768).

Almost surely, 2^{1220011010001} is an apocalyptic number.

It is an amenable number.

1220011010001 is a deficient number, since it is larger than the sum of its proper divisors (933361211439).

1220011010001 is a wasteful number, since it uses less digits than its factorization.

1220011010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107976 (or 107967 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1220011010001 its reverse (1000101100221), we get a palindrome (2220112110222).

The spelling of 1220011010001 in words is "one trillion, two hundred twenty billion, eleven million, ten thousand, one".