22220201002421 has 2 divisors, whose sum is σ = 22220201002422. Its totient is φ = 22220201002420.

The previous prime is 22220201002409. The next prime is 22220201002463. The reversal of 22220201002421 is 12420010202222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22175726410321 + 44474592100 = 4709111^2 + 210890^2 .

It is a cyclic number.

It is not a de Polignac number, because 22220201002421 - 2³⁰ = 22219127260597 is a prime.

It is a super-2 number, since 2×22220201002421² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22220201002393 and 22220201002402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22220201062421) 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 as a sum of consecutive naturals, namely, 11110100501210 + 11110100501211.

It is an arithmetic number, because the mean of its divisors is an integer number (11110100501211).

Almost surely, 2^{22220201002421} is an apocalyptic number.

It is an amenable number.

22220201002421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220201002421 is an equidigital number, since it uses as much as digits as its factorization.

22220201002421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22220201002421 its reverse (12420010202222), we get a palindrome (34640211204643).

The spelling of 22220201002421 in words is "twenty-two trillion, two hundred twenty billion, two hundred one million, two thousand, four hundred twenty-one".