21211233332 has 6 divisors (see below), whose sum is σ = 37119658338. Its totient is φ = 10605616664.

The previous prime is 21211233299. The next prime is 21211233341. The reversal of 21211233332 is 23333211212.

It can be written as a sum of positive squares in only one way, i.e., 20142989476 + 1068243856 = 141926^2 + 32684^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21211233298 and 21211233307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2651404163 + ... + 2651404170.

It is an arithmetic number, because the mean of its divisors is an integer number (6186609723).

Almost surely, 2^21211233332 is an apocalyptic number.

It is an amenable number.

21211233332 is a deficient number, since it is larger than the sum of its proper divisors (15908425006).

21211233332 is a wasteful number, since it uses less digits than its factorization.

21211233332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5302808337 (or 5302808335 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

Adding to 21211233332 its reverse (23333211212), we get a palindrome (44544444544).

The spelling of 21211233332 in words is "twenty-one billion, two hundred eleven million, two hundred thirty-three thousand, three hundred thirty-two".