22212077 has 2 divisors, whose sum is σ = 22212078. Its totient is φ = 22212076.

The previous prime is 22212049. The next prime is 22212079. The reversal of 22212077 is 77021222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16801801 + 5410276 = 4099^2 + 2326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22212077 is a prime.

Together with 22212079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106038 + 11106039.

It is an arithmetic number, because the mean of its divisors is an integer number (11106039).

Almost surely, 2^22212077 is an apocalyptic number.

It is an amenable number.

22212077 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212077 is an equidigital number, since it uses as much as digits as its factorization.

22212077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 22212077 is about 4712.9690217526. The cubic root of 22212077 is about 281.1014311957.

Adding to 22212077 its reverse (77021222), we get a palindrome (99233299).

The spelling of 22212077 in words is "twenty-two million, two hundred twelve thousand, seventy-seven".