1120001221001 has 4 divisors (see below), whose sum is σ = 1206155161092. Its totient is φ = 1033847280912.

The previous prime is 1120001220941. The next prime is 1120001221013. The reversal of 1120001221001 is 1001221000211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52755199225 + 1067246021776 = 229685^2 + 1033076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1120001221001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1120001221061) 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, 43076970026 + ... + 43076970051.

It is an arithmetic number, because the mean of its divisors is an integer number (301538790273).

Almost surely, 2^{1120001221001} is an apocalyptic number.

It is an amenable number.

1120001221001 is a deficient number, since it is larger than the sum of its proper divisors (86153940091).

1120001221001 is an equidigital number, since it uses as much as digits as its factorization.

1120001221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86153940090.

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

Adding to 1120001221001 its reverse (1001221000211), we get a palindrome (2121222221212).

The spelling of 1120001221001 in words is "one trillion, one hundred twenty billion, one million, two hundred twenty-one thousand, one".