21311221132 has 12 divisors (see below), whose sum is σ = 37301433120. Its totient is φ = 10653668816.

The previous prime is 21311221103. The next prime is 21311221153. The reversal of 21311221132 is 23112211312.

It is a super-3 number, since 3×21311221132³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460603 + ... + 504754.

It is an arithmetic number, because the mean of its divisors is an integer number (3108452760).

Almost surely, 2^21311221132 is an apocalyptic number.

It is an amenable number.

21311221132 is a deficient number, since it is larger than the sum of its proper divisors (15990211988).

21311221132 is a wasteful number, since it uses less digits than its factorization.

21311221132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970880 (or 970878 counting only the distinct ones).

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

Adding to 21311221132 its reverse (23112211312), we get a palindrome (44423432444).

The spelling of 21311221132 in words is "twenty-one billion, three hundred eleven million, two hundred twenty-one thousand, one hundred thirty-two".