21335345331941 has 2 divisors, whose sum is σ = 21335345331942. Its totient is φ = 21335345331940.

The previous prime is 21335345331913. The next prime is 21335345332027. The reversal of 21335345331941 is 14913354353312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21126065616100 + 209279715841 = 4596310^2 + 457471^2 .

It is a cyclic number.

It is not a de Polignac number, because 21335345331941 - 2⁶ = 21335345331877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21335345351941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667672665970 + 10667672665971.

It is an arithmetic number, because the mean of its divisors is an integer number (10667672665971).

Almost surely, 2^{21335345331941} is an apocalyptic number.

It is an amenable number.

21335345331941 is a deficient number, since it is larger than the sum of its proper divisors (1).

21335345331941 is an equidigital number, since it uses as much as digits as its factorization.

21335345331941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1749600, while the sum is 47.

The spelling of 21335345331941 in words is "twenty-one trillion, three hundred thirty-five billion, three hundred forty-five million, three hundred thirty-one thousand, nine hundred forty-one".