21102112202 has 8 divisors (see below), whose sum is σ = 31776333156. Its totient is φ = 10510001152.

The previous prime is 21102112201. The next prime is 21102112219. The reversal of 21102112202 is 20221120112.

It can be written as a sum of positive squares in 2 ways, for example, as 17734515241 + 3367596961 = 133171^2 + 58031^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21102112201) 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, 20526833 + ... + 20527860.

Almost surely, 2^21102112202 is an apocalyptic number.

21102112202 is a deficient number, since it is larger than the sum of its proper divisors (10674220954).

21102112202 is a wasteful number, since it uses less digits than its factorization.

21102112202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41054952.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21102112202 its reverse (20221120112), we get a palindrome (41323232314).

The spelling of 21102112202 in words is "twenty-one billion, one hundred two million, one hundred twelve thousand, two hundred two".