21211121332 has 6 divisors (see below), whose sum is σ = 37119462338. Its totient is φ = 10605560664.

The previous prime is 21211121303. The next prime is 21211121359. The reversal of 21211121332 is 23312111212.

It can be written as a sum of positive squares in only one way, i.e., 20723329936 + 487791396 = 143956^2 + 22086^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2651390163 + ... + 2651390170.

Almost surely, 2^21211121332 is an apocalyptic number.

It is an amenable number.

21211121332 is a deficient number, since it is larger than the sum of its proper divisors (15908341006).

21211121332 is a wasteful number, since it uses less digits than its factorization.

21211121332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5302780337 (or 5302780335 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 21211121332 its reverse (23312111212), we get a palindrome (44523232544).

The spelling of 21211121332 in words is "twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, three hundred thirty-two".