22000001010021 has 20 divisors (see below), whose sum is σ = 32981153518764. Its totient is φ = 14614472779200.

The previous prime is 22000001010011. The next prime is 22000001010023. The reversal of 22000001010021 is 12001010000022.

It can be written as a sum of positive squares in 2 ways, for example, as 12021572921796 + 9978428088225 = 3467214^2 + 3158865^2 .

It is not a de Polignac number, because 22000001010021 - 2⁶ = 22000001009957 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 = 22000001009985 and 22000001010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000001010023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 483260070 + ... + 483305591.

Almost surely, 2^{22000001010021} is an apocalyptic number.

It is an amenable number.

22000001010021 is a deficient number, since it is larger than the sum of its proper divisors (10981152508743).

22000001010021 is an equidigital number, since it uses as much as digits as its factorization.

22000001010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966565954 (or 966565945 counting only the distinct ones).

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

Adding to 22000001010021 its reverse (12001010000022), we get a palindrome (34001011010043).

The spelling of 22000001010021 in words is "twenty-two trillion, one million, ten thousand, twenty-one".