21222233333057 has 2 divisors, whose sum is σ = 21222233333058. Its totient is φ = 21222233333056.

The previous prime is 21222233332973. The next prime is 21222233333087. The reversal of 21222233333057 is 75033333222212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20099091206401 + 1123142126656 = 4483201^2 + 1059784^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222233333057 - 2³² = 21217938365761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21222233333057.

It is not a weakly prime, because it can be changed into another prime (21222233333087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611116666528 + 10611116666529.

It is an arithmetic number, because the mean of its divisors is an integer number (10611116666529).

Almost surely, 2^{21222233333057} is an apocalyptic number.

It is an amenable number.

21222233333057 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222233333057 is an equidigital number, since it uses as much as digits as its factorization.

21222233333057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 38.

Adding to 21222233333057 its reverse (75033333222212), we get a palindrome (96255566555269).

The spelling of 21222233333057 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred thirty-three million, three hundred thirty-three thousand, fifty-seven".