21223212212032 has 14 divisors (see below), whose sum is σ = 42114811733378. Its totient is φ = 10611606105984.

The previous prime is 21223212212011. The next prime is 21223212212051. The reversal of 21223212212032 is 23021221232212.

It can be written as a sum of positive squares in only one way, i.e., 20920597801216 + 302614410816 = 4573904^2 + 550104^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21223212211988 and 21223212212006.

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, 165806345343 + ... + 165806345470.

Almost surely, 2^{21223212212032} is an apocalyptic number.

It is an amenable number.

21223212212032 is a deficient number, since it is larger than the sum of its proper divisors (20891599521346).

21223212212032 is an equidigital number, since it uses as much as digits as its factorization.

21223212212032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331612690825 (or 331612690815 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21223212212032 its reverse (23021221232212), we get a palindrome (44244433444244).

The spelling of 21223212212032 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred twelve million, two hundred twelve thousand, thirty-two".