21212311332 has 48 divisors (see below), whose sum is σ = 49672998144. Its totient is φ = 7045440000.

The previous prime is 21212311321. The next prime is 21212311343. The reversal of 21212311332 is 23311321212.

It is an interprime number because it is at equal distance from previous prime (21212311321) and next prime (21212311343).

It is a super-2 number, since 2×21212311332² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21212311299 and 21212311308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5921782 + ... + 5925362.

It is an arithmetic number, because the mean of its divisors is an integer number (1034854128).

Almost surely, 2^21212311332 is an apocalyptic number.

It is an amenable number.

21212311332 is an abundant number, since it is smaller than the sum of its proper divisors (28460686812).

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

21212311332 is a wasteful number, since it uses less digits than its factorization.

21212311332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220 (or 5218 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 21212311332 its reverse (23311321212), we get a palindrome (44523632544).

The spelling of 21212311332 in words is "twenty-one billion, two hundred twelve million, three hundred eleven thousand, three hundred thirty-two".