21002112111202 has 8 divisors (see below), whose sum is σ = 31503264622956. Its totient is φ = 10501023903552.

The previous prime is 21002112111187. The next prime is 21002112111203. The reversal of 21002112111202 is 20211121120012.

It can be written as a sum of positive squares in 2 ways, for example, as 18036762674841 + 2965349436361 = 4246971^2 + 1722019^2 .

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

It is a super-2 number, since 2×21002112111202² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21002112111203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15251043 + ... + 16571014.

Almost surely, 2^{21002112111202} is an apocalyptic number.

21002112111202 is a deficient number, since it is larger than the sum of its proper divisors (10501152511754).

21002112111202 is a wasteful number, since it uses less digits than its factorization.

21002112111202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32152052.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21002112111202 its reverse (20211121120012), we get a palindrome (41213233231214).

The spelling of 21002112111202 in words is "twenty-one trillion, two billion, one hundred twelve million, one hundred eleven thousand, two hundred two".