21001101202 has 8 divisors (see below), whose sum is σ = 31509092412. Its totient is φ = 10498070400.

The previous prime is 21001101193. The next prime is 21001101217. The reversal of 21001101202 is 20210110012.

It can be written as a sum of positive squares in 2 ways, for example, as 19429850881 + 1571250321 = 139391^2 + 39639^2 .

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, 1229499 + ... + 1246462.

Almost surely, 2^21001101202 is an apocalyptic number.

21001101202 is a deficient number, since it is larger than the sum of its proper divisors (10507991210).

21001101202 is a wasteful number, since it uses less digits than its factorization.

21001101202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480204.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21001101202 its reverse (20210110012), we get a palindrome (41211211214).

The spelling of 21001101202 in words is "twenty-one billion, one million, one hundred one thousand, two hundred two".