21233347211 has 4 divisors (see below), whose sum is σ = 21237098400. Its totient is φ = 21229596024.

The previous prime is 21233347171. The next prime is 21233347217. The reversal of 21233347211 is 11274333212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21233347211 - 2²² = 21229152907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233347217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1867091 + ... + 1878428.

It is an arithmetic number, because the mean of its divisors is an integer number (5309274600).

Almost surely, 2^21233347211 is an apocalyptic number.

21233347211 is a deficient number, since it is larger than the sum of its proper divisors (3751189).

21233347211 is an equidigital number, since it uses as much as digits as its factorization.

21233347211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751188.

The product of its digits is 6048, while the sum is 29.

The spelling of 21233347211 in words is "twenty-one billion, two hundred thirty-three million, three hundred forty-seven thousand, two hundred eleven".