21100231202 has 8 divisors (see below), whose sum is σ = 31653212076. Its totient is φ = 10549160512.

The previous prime is 21100231171. The next prime is 21100231379. The reversal of 21100231202 is 20213200112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15906002161 + 5194229041 = 126119^2 + 72071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449603 + ... + 494310.

Almost surely, 2^21100231202 is an apocalyptic number.

21100231202 is a deficient number, since it is larger than the sum of its proper divisors (10552980874).

21100231202 is a wasteful number, since it uses less digits than its factorization.

21100231202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955092.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21100231202 its reverse (20213200112), we get a palindrome (41313431314).

The spelling of 21100231202 in words is "twenty-one billion, one hundred million, two hundred thirty-one thousand, two hundred two".