21211223334 has 32 divisors (see below), whose sum is σ = 48510938880. Its totient is φ = 6056831712.

The previous prime is 21211223317. The next prime is 21211223339. The reversal of 21211223334 is 43332211212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211223339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72924 + ... + 218495.

It is an arithmetic number, because the mean of its divisors is an integer number (1515966840).

Almost surely, 2^21211223334 is an apocalyptic number.

21211223334 is an abundant number, since it is smaller than the sum of its proper divisors (27299715546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21211223334 is a wasteful number, since it uses less digits than its factorization.

21211223334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293164.

The product of its digits is 1728, while the sum is 24.

Adding to 21211223334 its reverse (43332211212), we get a palindrome (64543434546).

The spelling of 21211223334 in words is "twenty-one billion, two hundred eleven million, two hundred twenty-three thousand, three hundred thirty-four".