21442234312 has 32 divisors (see below), whose sum is σ = 42376039200. Its totient is φ = 10143446400.

The previous prime is 21442234277. The next prime is 21442234321. The reversal of 21442234312 is 21343224412.

It is a super-2 number, since 2×21442234312² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22987 + ... + 208357.

It is an arithmetic number, because the mean of its divisors is an integer number (1324251225).

Almost surely, 2^21442234312 is an apocalyptic number.

It is an amenable number.

21442234312 is a deficient number, since it is larger than the sum of its proper divisors (20933804888).

21442234312 is a wasteful number, since it uses less digits than its factorization.

21442234312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186157 (or 186153 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

Adding to 21442234312 its reverse (21343224412), we get a palindrome (42785458724).

The spelling of 21442234312 in words is "twenty-one billion, four hundred forty-two million, two hundred thirty-four thousand, three hundred twelve".