21346344211 has 2 divisors, whose sum is σ = 21346344212. Its totient is φ = 21346344210.

The previous prime is 21346344197. The next prime is 21346344317. The reversal of 21346344211 is 11244364312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21346344211 - 2⁵ = 21346344179 is a prime.

It is a super-2 number, since 2×21346344211² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21346344011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10673172105 + 10673172106.

It is an arithmetic number, because the mean of its divisors is an integer number (10673172106).

Almost surely, 2^21346344211 is an apocalyptic number.

21346344211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21346344211 is an equidigital number, since it uses as much as digits as its factorization.

21346344211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The spelling of 21346344211 in words is "twenty-one billion, three hundred forty-six million, three hundred forty-four thousand, two hundred eleven".