22000102021 has 4 divisors (see below), whose sum is σ = 22000853452. Its totient is φ = 21999350592.

The previous prime is 22000102009. The next prime is 22000102037. The reversal of 22000102021 is 12020100022.

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 121550625 + 21878551396 = 11025^2 + 147914^2 .

It is a cyclic number.

It is not a de Polignac number, because 22000102021 - 2⁵ = 22000101989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22000101989 and 22000102007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000102051) 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 3 ways as a sum of consecutive naturals, for example, 329940 + ... + 390973.

It is an arithmetic number, because the mean of its divisors is an integer number (5500213363).

Almost surely, 2^22000102021 is an apocalyptic number.

It is an amenable number.

22000102021 is a deficient number, since it is larger than the sum of its proper divisors (751431).

22000102021 is an equidigital number, since it uses as much as digits as its factorization.

22000102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751430.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 22000102021 its reverse (12020100022), we get a palindrome (34020202043).

The spelling of 22000102021 in words is "twenty-two billion, one hundred two thousand, twenty-one".