22221021001 has 2 divisors, whose sum is σ = 22221021002. Its totient is φ = 22221021000.

The previous prime is 22221020957. The next prime is 22221021023. The reversal of 22221021001 is 10012012222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19366897225 + 2854123776 = 139165^2 + 53424^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221021001 - 2⁷ = 22221020873 is a prime.

It is not a weakly prime, because it can be changed into another prime (22221021701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110510500 + 11110510501.

It is an arithmetic number, because the mean of its divisors is an integer number (11110510501).

Almost surely, 2^22221021001 is an apocalyptic number.

It is an amenable number.

22221021001 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221021001 is an equidigital number, since it uses as much as digits as its factorization.

22221021001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22221021001 its reverse (10012012222), we get a palindrome (32233033223).

The spelling of 22221021001 in words is "twenty-two billion, two hundred twenty-one million, twenty-one thousand, one".