21100612419543 has 16 divisors (see below), whose sum is σ = 29695589189120. Its totient is φ = 13290390026496.

The previous prime is 21100612419541. The next prime is 21100612419563. The reversal of 21100612419543 is 34591421600112.

It is not a de Polignac number, because 21100612419543 - 2¹ = 21100612419541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100612419541) 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, 504319930 + ... + 504361767.

It is an arithmetic number, because the mean of its divisors is an integer number (1855974324320).

Almost surely, 2^{21100612419543} is an apocalyptic number.

21100612419543 is a deficient number, since it is larger than the sum of its proper divisors (8594976769577).

21100612419543 is a wasteful number, since it uses less digits than its factorization.

21100612419543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008682086.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 21100612419543 in words is "twenty-one trillion, one hundred billion, six hundred twelve million, four hundred nineteen thousand, five hundred forty-three".