21224512123634 has 8 divisors (see below), whose sum is σ = 31887222653568. Its totient is φ = 10595437905780.

The previous prime is 21224512123609. The next prime is 21224512123667. The reversal of 21224512123634 is 43632121542212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8409076442 + ... + 8409078965.

It is an arithmetic number, because the mean of its divisors is an integer number (3985902831696).

Almost surely, 2^{21224512123634} is an apocalyptic number.

21224512123634 is a deficient number, since it is larger than the sum of its proper divisors (10662710529934).

21224512123634 is a wasteful number, since it uses less digits than its factorization.

21224512123634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16818156040.

The product of its digits is 138240, while the sum is 38.

Adding to 21224512123634 its reverse (43632121542212), we get a palindrome (64856633665846).

The spelling of 21224512123634 in words is "twenty-one trillion, two hundred twenty-four billion, five hundred twelve million, one hundred twenty-three thousand, six hundred thirty-four".