21222015416654 has 16 divisors (see below), whose sum is σ = 34455736088928. Its totient is φ = 9745056666912.

The previous prime is 21222015416617. The next prime is 21222015416669. The reversal of 21222015416654 is 45661451022212.

It is a congruent number.

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, 2071648082 + ... + 2071658325.

It is an arithmetic number, because the mean of its divisors is an integer number (2153483505558).

Almost surely, 2^{21222015416654} is an apocalyptic number.

21222015416654 is a deficient number, since it is larger than the sum of its proper divisors (13233720672274).

21222015416654 is a wasteful number, since it uses less digits than its factorization.

21222015416654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4143306619.

The product of its (nonzero) digits is 230400, while the sum is 41.

Adding to 21222015416654 its reverse (45661451022212), we get a palindrome (66883466438866).

The spelling of 21222015416654 in words is "twenty-one trillion, two hundred twenty-two billion, fifteen million, four hundred sixteen thousand, six hundred fifty-four".