1001220001121 has 4 divisors (see below), whose sum is σ = 1033517420544. Its totient is φ = 968922581700.

The previous prime is 1001220001097. The next prime is 1001220001123. The reversal of 1001220001121 is 1211000221001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001220001121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1001220001123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16148709665 + ... + 16148709726.

It is an arithmetic number, because the mean of its divisors is an integer number (258379355136).

Almost surely, 2^{1001220001121} is an apocalyptic number.

It is an amenable number.

1001220001121 is a deficient number, since it is larger than the sum of its proper divisors (32297419423).

1001220001121 is an equidigital number, since it uses as much as digits as its factorization.

1001220001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32297419422.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001220001121 its reverse (1211000221001), we get a palindrome (2212220222122).

The spelling of 1001220001121 in words is "one trillion, one billion, two hundred twenty million, one thousand, one hundred twenty-one".