21334402011 has 32 divisors (see below), whose sum is σ = 31231448640. Its totient is φ = 12873129984.

The previous prime is 21334401971. The next prime is 21334402013. The reversal of 21334402011 is 11020443312.

It is not a de Polignac number, because 21334402011 - 2⁹ = 21334401499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21334402013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6548695 + ... + 6551951.

It is an arithmetic number, because the mean of its divisors is an integer number (975982770).

Almost surely, 2^21334402011 is an apocalyptic number.

21334402011 is a deficient number, since it is larger than the sum of its proper divisors (9897046629).

21334402011 is a wasteful number, since it uses less digits than its factorization.

21334402011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6495.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21334402011 its reverse (11020443312), we get a palindrome (32354845323).

The spelling of 21334402011 in words is "twenty-one billion, three hundred thirty-four million, four hundred two thousand, eleven".