21450611097233 has 2 divisors, whose sum is σ = 21450611097234. Its totient is φ = 21450611097232.

The previous prime is 21450611097229. The next prime is 21450611097239. The reversal of 21450611097233 is 33279011605412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16684349283904 + 4766261813329 = 4084648^2 + 2183177^2 .

It is a cyclic number.

It is not a de Polignac number, because 21450611097233 - 2² = 21450611097229 is a prime.

It is not a weakly prime, because it can be changed into another prime (21450611097239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10725305548616 + 10725305548617.

It is an arithmetic number, because the mean of its divisors is an integer number (10725305548617).

Almost surely, 2^{21450611097233} is an apocalyptic number.

It is an amenable number.

21450611097233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21450611097233 is an equidigital number, since it uses as much as digits as its factorization.

21450611097233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 21450611097233 in words is "twenty-one trillion, four hundred fifty billion, six hundred eleven million, ninety-seven thousand, two hundred thirty-three".