21022034312 has 8 divisors (see below), whose sum is σ = 39416314350. Its totient is φ = 10511017152.

The previous prime is 21022034303. The next prime is 21022034347. The reversal of 21022034312 is 21343022012.

It can be written as a sum of positive squares in only one way, i.e., 21020940196 + 1094116 = 144986^2 + 1046^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21022034312² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1313877137 + ... + 1313877152.

Almost surely, 2^21022034312 is an apocalyptic number.

It is an amenable number.

21022034312 is a deficient number, since it is larger than the sum of its proper divisors (18394280038).

21022034312 is a wasteful number, since it uses less digits than its factorization.

21022034312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627754295 (or 2627754291 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21022034312 its reverse (21343022012), we get a palindrome (42365056324).

The spelling of 21022034312 in words is "twenty-one billion, twenty-two million, thirty-four thousand, three hundred twelve".