21100001030 has 32 divisors (see below), whose sum is σ = 40526632800. Its totient is φ = 7886253312.

The previous prime is 21100000991. The next prime is 21100001033. The reversal of 21100001030 is 3010000112.

It is a junction number, because it is equal to n+sod(n) for n = 21100000999 and 21100001017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100001033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 746765 + ... + 774504.

It is an arithmetic number, because the mean of its divisors is an integer number (1266457275).

Almost surely, 2^21100001030 is an apocalyptic number.

21100001030 is a deficient number, since it is larger than the sum of its proper divisors (19426631770).

21100001030 is a wasteful number, since it uses less digits than its factorization.

21100001030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521368.

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 21100001030 its reverse (3010000112), we get a palindrome (24110001142).

The spelling of 21100001030 in words is "twenty-one billion, one hundred million, one thousand, thirty".