21221012123033 has 2 divisors, whose sum is σ = 21221012123034. Its totient is φ = 21221012123032.

The previous prime is 21221012122969. The next prime is 21221012123041. The reversal of 21221012123033 is 33032121012212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21207756515344 + 13255607689 = 4605188^2 + 115133^2 .

It is a cyclic number.

It is not a de Polignac number, because 21221012123033 - 2⁶ = 21221012122969 is a prime.

It is not a weakly prime, because it can be changed into another prime (21221012123933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610506061516 + 10610506061517.

It is an arithmetic number, because the mean of its divisors is an integer number (10610506061517).

Almost surely, 2^{21221012123033} is an apocalyptic number.

It is an amenable number.

21221012123033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221012123033 is an equidigital number, since it uses as much as digits as its factorization.

21221012123033 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 21221012123033 its reverse (33032121012212), we get a palindrome (54253133135245).

The spelling of 21221012123033 in words is "twenty-one trillion, two hundred twenty-one billion, twelve million, one hundred twenty-three thousand, thirty-three".