21216043025150 has 24 divisors (see below), whose sum is σ = 39462833176104. Its totient is φ = 8486203629600.

The previous prime is 21216043025123. The next prime is 21216043025153. The reversal of 21216043025150 is 5152034061212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21216043025153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3325421 + ... + 7313720.

It is an arithmetic number, because the mean of its divisors is an integer number (1644284715671).

Almost surely, 2^{21216043025150} is an apocalyptic number.

21216043025150 is a deficient number, since it is larger than the sum of its proper divisors (18246790150954).

21216043025150 is a wasteful number, since it uses less digits than its factorization.

21216043025150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10679036 (or 10679031 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 21216043025150 its reverse (5152034061212), we get a palindrome (26368077086362).

The spelling of 21216043025150 in words is "twenty-one trillion, two hundred sixteen billion, forty-three million, twenty-five thousand, one hundred fifty".