21111424242204 has 48 divisors (see below), whose sum is σ = 49997405606400. Its totient is φ = 6931805523456.

The previous prime is 21111424242199. The next prime is 21111424242239. The reversal of 21111424242204 is 40224242411112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18152332 + ... + 19280300.

It is an arithmetic number, because the mean of its divisors is an integer number (1041612616800).

Almost surely, 2^{21111424242204} is an apocalyptic number.

It is an amenable number.

21111424242204 is an abundant number, since it is smaller than the sum of its proper divisors (28885981364196).

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

21111424242204 is a wasteful number, since it uses less digits than its factorization.

21111424242204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151322 (or 1151320 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

Adding to 21111424242204 its reverse (40224242411112), we get a palindrome (61335666653316).

The spelling of 21111424242204 in words is "twenty-one trillion, one hundred eleven billion, four hundred twenty-four million, two hundred forty-two thousand, two hundred four".