22021011009 has 12 divisors (see below), whose sum is σ = 31824884052. Its totient is φ = 14672940000.

The previous prime is 22021011007. The next prime is 22021011011. The reversal of 22021011009 is 90011012022.

It is an interprime number because it is at equal distance from previous prime (22021011007) and next prime (22021011011).

It can be written as a sum of positive squares in 2 ways, for example, as 12270435984 + 9750575025 = 110772^2 + 98745^2 .

It is not a de Polignac number, because 22021011009 - 2¹ = 22021011007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22021010982 and 22021011000.

It is not an unprimeable number, because it can be changed into a prime (22021011007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 626442 + ... + 660659.

It is an arithmetic number, because the mean of its divisors is an integer number (2652073671).

Almost surely, 2^22021011009 is an apocalyptic number.

It is an amenable number.

22021011009 is a deficient number, since it is larger than the sum of its proper divisors (9803873043).

22021011009 is a wasteful number, since it uses less digits than its factorization.

22021011009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289008 (or 1289005 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 22021011009 in words is "twenty-two billion, twenty-one million, eleven thousand, nine".