1011220012001 has 4 divisors (see below), whose sum is σ = 1011251294400. Its totient is φ = 1011188729604.

The previous prime is 1011220011953. The next prime is 1011220012013. The reversal of 1011220012001 is 1002100221101.

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 not a de Polignac number, because 1011220012001 - 2¹⁸ = 1011219749857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011220012021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15592661 + ... + 15657378.

It is an arithmetic number, because the mean of its divisors is an integer number (252812823600).

Almost surely, 2^{1011220012001} is an apocalyptic number.

It is an amenable number.

1011220012001 is a deficient number, since it is larger than the sum of its proper divisors (31282399).

1011220012001 is an equidigital number, since it uses as much as digits as its factorization.

1011220012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31282398.

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

Adding to 1011220012001 its reverse (1002100221101), we get a palindrome (2013320233102).

The spelling of 1011220012001 in words is "one trillion, eleven billion, two hundred twenty million, twelve thousand, one".