21113511354554 has 32 divisors (see below), whose sum is σ = 31959375108096. Its totient is φ = 10460598603840.

The previous prime is 21113511354539. The next prime is 21113511354613. The reversal of 21113511354554 is 45545311531112.

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 15 ways as a sum of consecutive naturals, for example, 1474091237 + ... + 1474105559.

It is an arithmetic number, because the mean of its divisors is an integer number (998730472128).

Almost surely, 2^{21113511354554} is an apocalyptic number.

21113511354554 is a deficient number, since it is larger than the sum of its proper divisors (10845863753542).

21113511354554 is a wasteful number, since it uses less digits than its factorization.

21113511354554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21270.

The product of its digits is 180000, while the sum is 41.

Adding to 21113511354554 its reverse (45545311531112), we get a palindrome (66658822885666).

The spelling of 21113511354554 in words is "twenty-one trillion, one hundred thirteen billion, five hundred eleven million, three hundred fifty-four thousand, five hundred fifty-four".