21122243132 has 48 divisors (see below), whose sum is σ = 38252672640. Its totient is φ = 10197591552.

The previous prime is 21122243099. The next prime is 21122243137. The reversal of 21122243132 is 23134222112.

It is a super-2 number, since 2×21122243132² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122243098 and 21122243107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122243137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12654794 + ... + 12656462.

It is an arithmetic number, because the mean of its divisors is an integer number (796930680).

Almost surely, 2^21122243132 is an apocalyptic number.

It is an amenable number.

21122243132 is a deficient number, since it is larger than the sum of its proper divisors (17130429508).

21122243132 is a wasteful number, since it uses less digits than its factorization.

21122243132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310 (or 2308 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

Adding to 21122243132 its reverse (23134222112), we get a palindrome (44256465244).

The spelling of 21122243132 in words is "twenty-one billion, one hundred twenty-two million, two hundred forty-three thousand, one hundred thirty-two".