1011323312021 has 6 divisors (see below), whose sum is σ = 1111619838966. Its totient is φ = 919384829000.

The previous prime is 1011323311991. The next prime is 1011323312039. The reversal of 1011323312021 is 1202133231101.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1004777692996 + 6545619025 = 1002386^2 + 80905^2 .

It is not a de Polignac number, because 1011323312021 - 2²² = 1011319117717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011323311984 and 1011323312002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011323312521) 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 5 ways as a sum of consecutive naturals, for example, 4179021830 + ... + 4179022071.

It is an arithmetic number, because the mean of its divisors is an integer number (185269973161).

Almost surely, 2^{1011323312021} is an apocalyptic number.

1011323312021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011323312021 is a deficient number, since it is larger than the sum of its proper divisors (100296526945).

1011323312021 is an equidigital number, since it uses as much as digits as its factorization.

1011323312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8358043923 (or 8358043912 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1011323312021 its reverse (1202133231101), we get a palindrome (2213456543122).

The spelling of 1011323312021 in words is "one trillion, eleven billion, three hundred twenty-three million, three hundred twelve thousand, twenty-one".