1222062521 has 2 divisors, whose sum is σ = 1222062522. Its totient is φ = 1222062520.

The previous prime is 1222062487. The next prime is 1222062571. The reversal of 1222062521 is 1252602221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1184116921 + 37945600 = 34411^2 + 6160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222062521 - 2²² = 1217868217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1222062571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611031260 + 611031261.

It is an arithmetic number, because the mean of its divisors is an integer number (611031261).

Almost surely, 2^1222062521 is an apocalyptic number.

It is an amenable number.

1222062521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222062521 is an equidigital number, since it uses as much as digits as its factorization.

1222062521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1222062521 is about 34958.0108272768. The cubic root of 1222062521 is about 1069.1315400472.

Adding to 1222062521 its reverse (1252602221), we get a palindrome (2474664742).

The spelling of 1222062521 in words is "one billion, two hundred twenty-two million, sixty-two thousand, five hundred twenty-one".