1011320320021 has 8 divisors (see below), whose sum is σ = 1103269716288. Its totient is φ = 919372788000.

The previous prime is 1011320320009. The next prime is 1011320320091. The reversal of 1011320320021 is 1200230231101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011320320021 - 2²⁵ = 1011286765589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011320319977 and 1011320320004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011320320091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823336 + ... + 1643326.

It is an arithmetic number, because the mean of its divisors is an integer number (137908714536).

Almost surely, 2^{1011320320021} is an apocalyptic number.

1011320320021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011320320021 is a deficient number, since it is larger than the sum of its proper divisors (91949396267).

1011320320021 is a wasteful number, since it uses less digits than its factorization.

1011320320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932123.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1011320320021 its reverse (1200230231101), we get a palindrome (2211550551122).

The spelling of 1011320320021 in words is "one trillion, eleven billion, three hundred twenty million, three hundred twenty thousand, twenty-one".