21222133061 has 2 divisors, whose sum is σ = 21222133062. Its totient is φ = 21222133060.

The previous prime is 21222133057. The next prime is 21222133099. The reversal of 21222133061 is 16033122212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15249780100 + 5972352961 = 123490^2 + 77281^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222133061 - 2² = 21222133057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222433061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611066530 + 10611066531.

It is an arithmetic number, because the mean of its divisors is an integer number (10611066531).

Almost surely, 2^21222133061 is an apocalyptic number.

It is an amenable number.

21222133061 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222133061 is an equidigital number, since it uses as much as digits as its factorization.

21222133061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21222133061 its reverse (16033122212), we get a palindrome (37255255273).

The spelling of 21222133061 in words is "twenty-one billion, two hundred twenty-two million, one hundred thirty-three thousand, sixty-one".