21220212032 has 28 divisors (see below), whose sum is σ = 42114619860. Its totient is φ = 10608654336.

The previous prime is 21220212011. The next prime is 21220212053. The reversal of 21220212032 is 23021202212.

It is an interprime number because it is at equal distance from previous prime (21220212011) and next prime (21220212053).

It can be written as a sum of positive squares in 2 ways, for example, as 3206277376 + 18013934656 = 56624^2 + 134216^2 .

It is a super-3 number, since 3×21220212032³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21220212032.

It is a congruent number.

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, 567944 + ... + 604152.

Almost surely, 2^21220212032 is an apocalyptic number.

It is an amenable number.

21220212032 is a deficient number, since it is larger than the sum of its proper divisors (20894407828).

21220212032 is an equidigital number, since it uses as much as digits as its factorization.

21220212032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45378 (or 45368 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21220212032 its reverse (23021202212), we get a palindrome (44241414244).

The spelling of 21220212032 in words is "twenty-one billion, two hundred twenty million, two hundred twelve thousand, thirty-two".