1122011000021 has 4 divisors (see below), whose sum is σ = 1122984124332. Its totient is φ = 1121037875712.

The previous prime is 1122010999999. The next prime is 1122011000039. The reversal of 1122011000021 is 1200001102211.

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 805525995121 + 316485004900 = 897511^2 + 562570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122011000021 - 2⁶ = 1122010999957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122010999966 and 1122011000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122011008021) 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, 486560426 + ... + 486562731.

It is an arithmetic number, because the mean of its divisors is an integer number (280746031083).

Almost surely, 2^{1122011000021} is an apocalyptic number.

It is an amenable number.

1122011000021 is a deficient number, since it is larger than the sum of its proper divisors (973124311).

1122011000021 is an equidigital number, since it uses as much as digits as its factorization.

1122011000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973124310.

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

Adding to 1122011000021 its reverse (1200001102211), we get a palindrome (2322012102232).

The spelling of 1122011000021 in words is "one trillion, one hundred twenty-two billion, eleven million, twenty-one", and thus it is an aban number.