21035332511 has 2 divisors, whose sum is σ = 21035332512. Its totient is φ = 21035332510.

The previous prime is 21035332489. The next prime is 21035332541. The reversal of 21035332511 is 11523353012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21035332511 - 2³⁴ = 3855463327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21035332541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517666255 + 10517666256.

It is an arithmetic number, because the mean of its divisors is an integer number (10517666256).

Almost surely, 2^21035332511 is an apocalyptic number.

21035332511 is a deficient number, since it is larger than the sum of its proper divisors (1).

21035332511 is an equidigital number, since it uses as much as digits as its factorization.

21035332511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 21035332511 its reverse (11523353012), we get a palindrome (32558685523).

The spelling of 21035332511 in words is "twenty-one billion, thirty-five million, three hundred thirty-two thousand, five hundred eleven".