21669054311 has 2 divisors, whose sum is σ = 21669054312. Its totient is φ = 21669054310.

The previous prime is 21669054287. The next prime is 21669054413. The reversal of 21669054311 is 11345096612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21669054311 - 2⁶ = 21669054247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21669053311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10834527155 + 10834527156.

It is an arithmetic number, because the mean of its divisors is an integer number (10834527156).

Almost surely, 2^21669054311 is an apocalyptic number.

21669054311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21669054311 is an equidigital number, since it uses as much as digits as its factorization.

21669054311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 21669054311 in words is "twenty-one billion, six hundred sixty-nine million, fifty-four thousand, three hundred eleven".