21122225416 has 32 divisors (see below), whose sum is σ = 42021504000. Its totient is φ = 9919088896.

The previous prime is 21122225407. The next prime is 21122225419. The reversal of 21122225416 is 61452222112.

It is a happy number.

It is a super-2 number, since 2×21122225416² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122225419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96976 + ... + 227263.

It is an arithmetic number, because the mean of its divisors is an integer number (1313172000).

Almost surely, 2^21122225416 is an apocalyptic number.

It is an amenable number.

21122225416 is a deficient number, since it is larger than the sum of its proper divisors (20899278584).

21122225416 is a wasteful number, since it uses less digits than its factorization.

21122225416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324741 (or 324737 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

Adding to 21122225416 its reverse (61452222112), we get a palindrome (82574447528).

The spelling of 21122225416 in words is "twenty-one billion, one hundred twenty-two million, two hundred twenty-five thousand, four hundred sixteen".