21100123302 has 32 divisors (see below), whose sum is σ = 43009989120. Its totient is φ = 6898500960.

The previous prime is 21100123283. The next prime is 21100123357. The reversal of 21100123302 is 20332100112.

It is a congruent number.

It is an unprimeable number.

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, 1237777 + ... + 1254707.

It is an arithmetic number, because the mean of its divisors is an integer number (1344062160).

Almost surely, 2^21100123302 is an apocalyptic number.

21100123302 is an abundant number, since it is smaller than the sum of its proper divisors (21909865818).

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

21100123302 is a wasteful number, since it uses less digits than its factorization.

21100123302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20908.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21100123302 its reverse (20332100112), we get a palindrome (41432223414).

The spelling of 21100123302 in words is "twenty-one billion, one hundred million, one hundred twenty-three thousand, three hundred two".