21101111202 has 32 divisors (see below), whose sum is σ = 42495151104. Its totient is φ = 6985008000.

The previous prime is 21101111189. The next prime is 21101111221. The reversal of 21101111202 is 20211110112.

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 15 ways as a sum of consecutive naturals, for example, 673428 + ... + 704064.

It is an arithmetic number, because the mean of its divisors is an integer number (1327973472).

Almost surely, 2^21101111202 is an apocalyptic number.

21101111202 is an abundant number, since it is smaller than the sum of its proper divisors (21394039902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21101111202 is a wasteful number, since it uses less digits than its factorization.

21101111202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31434.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21101111202 its reverse (20211110112), we get a palindrome (41312221314).

The spelling of 21101111202 in words is "twenty-one billion, one hundred one million, one hundred eleven thousand, two hundred two".