21122434012 has 12 divisors (see below), whose sum is σ = 36965297376. Its totient is φ = 10560920480.

The previous prime is 21122433979. The next prime is 21122434013. The reversal of 21122434012 is 21043422112.

It is a super-2 number, since 2×21122434012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122434013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193488 + ... + 282280.

It is an arithmetic number, because the mean of its divisors is an integer number (3080441448).

Almost surely, 2^21122434012 is an apocalyptic number.

It is an amenable number.

21122434012 is a deficient number, since it is larger than the sum of its proper divisors (15842863364).

21122434012 is a wasteful number, since it uses less digits than its factorization.

21122434012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148268 (or 148266 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21122434012 its reverse (21043422112), we get a palindrome (42165856124).

The spelling of 21122434012 in words is "twenty-one billion, one hundred twenty-two million, four hundred thirty-four thousand, twelve".