21211011304 has 48 divisors (see below), whose sum is σ = 47970338400. Its totient is φ = 8611981344.

The previous prime is 21211011293. The next prime is 21211011337. The reversal of 21211011304 is 40311011212.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 504394 + ... + 544825.

It is an arithmetic number, because the mean of its divisors is an integer number (999382050).

Almost surely, 2^21211011304 is an apocalyptic number.

It is an amenable number.

21211011304 is an abundant number, since it is smaller than the sum of its proper divisors (26759327096).

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

21211011304 is a wasteful number, since it uses less digits than its factorization.

21211011304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049270 (or 1049247 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21211011304 its reverse (40311011212), we get a palindrome (61522022516).

The spelling of 21211011304 in words is "twenty-one billion, two hundred eleven million, eleven thousand, three hundred four".