22010621 has 2 divisors, whose sum is σ = 22010622. Its totient is φ = 22010620.

The previous prime is 22010603. The next prime is 22010629. The reversal of 22010621 is 12601022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20884900 + 1125721 = 4570^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 22010621 - 2¹⁴ = 21994237 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22010596 and 22010605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22010629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005310 + 11005311.

It is an arithmetic number, because the mean of its divisors is an integer number (11005311).

Almost surely, 2^22010621 is an apocalyptic number.

It is an amenable number.

22010621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22010621 is an equidigital number, since it uses as much as digits as its factorization.

22010621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 22010621 is about 4691.5478256115. The cubic root of 22010621 is about 280.2490174168.

Adding to 22010621 its reverse (12601022), we get a palindrome (34611643).

The spelling of 22010621 in words is "twenty-two million, ten thousand, six hundred twenty-one".