21011055467 has 2 divisors, whose sum is σ = 21011055468. Its totient is φ = 21011055466.

The previous prime is 21011055419. The next prime is 21011055469. The reversal of 21011055467 is 76455011012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21011055467 - 2²⁰ = 21010006891 is a prime.

Together with 21011055469, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21011055469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505527733 + 10505527734.

It is an arithmetic number, because the mean of its divisors is an integer number (10505527734).

Almost surely, 2^21011055467 is an apocalyptic number.

21011055467 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011055467 is an equidigital number, since it uses as much as digits as its factorization.

21011055467 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 32.

Adding to 21011055467 its reverse (76455011012), we get a palindrome (97466066479).

The spelling of 21011055467 in words is "twenty-one billion, eleven million, fifty-five thousand, four hundred sixty-seven".