21121322510224 has 20 divisors (see below), whose sum is σ = 40923183784320. Its totient is φ = 10560500888480.

The previous prime is 21121322510159. The next prime is 21121322510251. The reversal of 21121322510224 is 42201522312112.

It is a super-2 number, since 2×21121322510224² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121322510192 and 21121322510201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8932744 + ... + 11047015.

It is an arithmetic number, because the mean of its divisors is an integer number (2046159189216).

Almost surely, 2^{21121322510224} is an apocalyptic number.

It is an amenable number.

21121322510224 is a deficient number, since it is larger than the sum of its proper divisors (19801861274096).

21121322510224 is a wasteful number, since it uses less digits than its factorization.

21121322510224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20045838 (or 20045832 counting only the distinct ones).

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

Adding to 21121322510224 its reverse (42201522312112), we get a palindrome (63322844822336).

The spelling of 21121322510224 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred twenty-two million, five hundred ten thousand, two hundred twenty-four".