1011001120321 has 4 divisors (see below), whose sum is σ = 1011005741872. Its totient is φ = 1010996498772.

The previous prime is 1011001120309. The next prime is 1011001120333. The reversal of 1011001120321 is 1230211001101.

It is a happy number.

1011001120321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (1011001120309) and next prime (1011001120333).

It is a cyclic number.

It is not a de Polignac number, because 1011001120321 - 2⁹ = 1011001119809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011001120421) 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, 1965435 + ... + 2425888.

It is an arithmetic number, because the mean of its divisors is an integer number (252751435468).

Almost surely, 2^{1011001120321} is an apocalyptic number.

It is an amenable number.

1011001120321 is a deficient number, since it is larger than the sum of its proper divisors (4621551).

1011001120321 is an equidigital number, since it uses as much as digits as its factorization.

1011001120321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4621550.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1011001120321 its reverse (1230211001101), we get a palindrome (2241212121422).

The spelling of 1011001120321 in words is "one trillion, eleven billion, one million, one hundred twenty thousand, three hundred twenty-one".