22021010001 has 10 divisors (see below), whose sum is σ = 32895582962. Its totient is φ = 14680673280.

The previous prime is 22021009979. The next prime is 22021010057. The reversal of 22021010001 is 10001012022.

It can be written as a sum of positive squares in only one way, i.e., 21956126976 + 64883025 = 148176^2 + 8055^2 .

It is not a de Polignac number, because 22021010001 - 2¹³ = 22021001809 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22021010101) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 135932080 + ... + 135932241.

Almost surely, 2^22021010001 is an apocalyptic number.

It is an amenable number.

22021010001 is a deficient number, since it is larger than the sum of its proper divisors (10874572961).

22021010001 is an equidigital number, since it uses as much as digits as its factorization.

22021010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271864333 (or 271864324 counting only the distinct ones).

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

Adding to 22021010001 its reverse (10001012022), we get a palindrome (32022022023).

The spelling of 22021010001 in words is "twenty-two billion, twenty-one million, ten thousand, one".