1122000021 has 12 divisors (see below), whose sum is σ = 1630373472. Its totient is φ = 743519976.

The previous prime is 1122000013. The next prime is 1122000031. The reversal of 1122000021 is 1200002211.

It is not a de Polignac number, because 1122000021 - 2³ = 1122000013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1121999967 and 1122000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122000031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 371751 + ... + 374756.

It is an arithmetic number, because the mean of its divisors is an integer number (135864456).

Almost surely, 2^1122000021 is an apocalyptic number.

It is an amenable number.

1122000021 is a deficient number, since it is larger than the sum of its proper divisors (508373451).

1122000021 is a wasteful number, since it uses less digits than its factorization.

1122000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746680 (or 746677 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1122000021 is about 33496.2687623562. The cubic root of 1122000021 is about 1039.1166133286.

Adding to 1122000021 its reverse (1200002211), we get a palindrome (2322002232).

The spelling of 1122000021 in words is "one billion, one hundred twenty-two million, twenty-one", and thus it is an aban number.