21100131202 has 8 divisors (see below), whose sum is σ = 31676553612. Its totient is φ = 10541280000.

The previous prime is 21100131193. The next prime is 21100131203. The reversal of 21100131202 is 20213100112.

It can be written as a sum of positive squares in 2 ways, for example, as 21080426481 + 19704721 = 145191^2 + 4439^2 .

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

It is a super-2 number, since 2×21100131202² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21100131203) 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 3 ways as a sum of consecutive naturals, for example, 4389799 + ... + 4394602.

Almost surely, 2^21100131202 is an apocalyptic number.

21100131202 is a deficient number, since it is larger than the sum of its proper divisors (10576422410).

21100131202 is a wasteful number, since it uses less digits than its factorization.

21100131202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8785604.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21100131202 its reverse (20213100112), we get a palindrome (41313231314).

The spelling of 21100131202 in words is "twenty-one billion, one hundred million, one hundred thirty-one thousand, two hundred two".