1220100110001 has 48 divisors (see below), whose sum is σ = 1880329540544. Its totient is φ = 790282842624.

The previous prime is 1220100109999. The next prime is 1220100110017. The reversal of 1220100110001 is 1000110010221.

It is a happy number.

It is not a de Polignac number, because 1220100110001 - 2¹ = 1220100109999 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220100110051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 675225 + ... + 1701801.

Almost surely, 2^{1220100110001} is an apocalyptic number.

It is an amenable number.

1220100110001 is a deficient number, since it is larger than the sum of its proper divisors (660229430543).

1220100110001 is an equidigital number, since it uses as much as digits as its factorization.

1220100110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026732 (or 1026720 counting only the distinct ones).

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

Adding to 1220100110001 its reverse (1000110010221), we get a palindrome (2220210120222).

The spelling of 1220100110001 in words is "one trillion, two hundred twenty billion, one hundred million, one hundred ten thousand, one".