21133311321043 has 2 divisors, whose sum is σ = 21133311321044. Its totient is φ = 21133311321042.

The previous prime is 21133311320993. The next prime is 21133311321103. The reversal of 21133311321043 is 34012311333112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21133311321043 - 2³⁷ = 20995872367571 is a prime.

It is not a weakly prime, because it can be changed into another prime (21133311421043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566655660521 + 10566655660522.

It is an arithmetic number, because the mean of its divisors is an integer number (10566655660522).

Almost surely, 2^{21133311321043} is an apocalyptic number.

21133311321043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133311321043 is an equidigital number, since it uses as much as digits as its factorization.

21133311321043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 21133311321043 its reverse (34012311333112), we get a palindrome (55145622654155).

The spelling of 21133311321043 in words is "twenty-one trillion, one hundred thirty-three billion, three hundred eleven million, three hundred twenty-one thousand, forty-three".