21301021011233 has 2 divisors, whose sum is σ = 21301021011234. Its totient is φ = 21301021011232.

The previous prime is 21301021011191. The next prime is 21301021011253. The reversal of 21301021011233 is 33211012010312.

It is a happy number.

It is an a-pointer prime, because the next prime (21301021011253) can be obtained adding 21301021011233 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17441748974224 + 3859272037009 = 4176332^2 + 1964503^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301021011233 - 2¹⁰ = 21301021010209 is a prime.

It is a super-2 number, since 2×21301021011233² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21301021011253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650510505616 + 10650510505617.

It is an arithmetic number, because the mean of its divisors is an integer number (10650510505617).

Almost surely, 2^{21301021011233} is an apocalyptic number.

It is an amenable number.

21301021011233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301021011233 is an equidigital number, since it uses as much as digits as its factorization.

21301021011233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21301021011233 its reverse (33211012010312), we get a palindrome (54512033021545).

The spelling of 21301021011233 in words is "twenty-one trillion, three hundred one billion, twenty-one million, eleven thousand, two hundred thirty-three".