21100231035 has 48 divisors (see below), whose sum is σ = 39793257504. Its totient is φ = 10280687616.

The previous prime is 21100230989. The next prime is 21100231049. The reversal of 21100231035 is 53013200112.

It is not a de Polignac number, because 21100231035 - 2⁹ = 21100230523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21100230999 and 21100231017.

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 47 ways as a sum of consecutive naturals, for example, 129177 + ... + 242666.

It is an arithmetic number, because the mean of its divisors is an integer number (829026198).

Almost surely, 2^21100231035 is an apocalyptic number.

21100231035 is a deficient number, since it is larger than the sum of its proper divisors (18693026469).

21100231035 is a wasteful number, since it uses less digits than its factorization.

21100231035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371964 (or 371961 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 21100231035 its reverse (53013200112), we get a palindrome (74113431147).

The spelling of 21100231035 in words is "twenty-one billion, one hundred million, two hundred thirty-one thousand, thirty-five".