21264446212 has 6 divisors (see below), whose sum is σ = 37212780878. Its totient is φ = 10632223104.

The previous prime is 21264446191. The next prime is 21264446233.

21264446212 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (21264446191) and next prime (21264446233).

It can be written as a sum of positive squares in only one way, i.e., 19885512256 + 1378933956 = 141016^2 + 37134^2 .

It is a super-2 number, since 2×21264446212² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2658055773 + ... + 2658055780.

Almost surely, 2^21264446212 is an apocalyptic number.

It is an amenable number.

21264446212 is a deficient number, since it is larger than the sum of its proper divisors (15948334666).

21264446212 is a wasteful number, since it uses less digits than its factorization.

21264446212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5316111557 (or 5316111555 counting only the distinct ones).

The product of its digits is 36864, while the sum is 34.

The spelling of 21264446212 in words is "twenty-one billion, two hundred sixty-four million, four hundred forty-six thousand, two hundred twelve".