21216223126632 has 64 divisors (see below), whose sum is σ = 56837224342080. Its totient is φ = 6575876375552.

The previous prime is 21216223126619. The next prime is 21216223126639. The reversal of 21216223126632 is 23662132261212.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21216223126639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313222443 + ... + 313290170.

It is an arithmetic number, because the mean of its divisors is an integer number (888081630345).

Almost surely, 2^{21216223126632} is an apocalyptic number.

It is an amenable number.

21216223126632 is an abundant number, since it is smaller than the sum of its proper divisors (35621001215448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21216223126632 is a wasteful number, since it uses less digits than its factorization.

21216223126632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626512722 (or 626512718 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

Adding to 21216223126632 its reverse (23662132261212), we get a palindrome (44878355387844).

The spelling of 21216223126632 in words is "twenty-one trillion, two hundred sixteen billion, two hundred twenty-three million, one hundred twenty-six thousand, six hundred thirty-two".