21111122202 has 16 divisors (see below), whose sum is σ = 43584252672. Its totient is φ = 6810039360.

The previous prime is 21111122183. The next prime is 21111122237. The reversal of 21111122202 is 20222111112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56750143 + ... + 56750514.

It is an arithmetic number, because the mean of its divisors is an integer number (2724015792).

Almost surely, 2^21111122202 is an apocalyptic number.

21111122202 is an abundant number, since it is smaller than the sum of its proper divisors (22473130470).

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

21111122202 is a wasteful number, since it uses less digits than its factorization.

21111122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113500693.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21111122202 its reverse (20222111112), we get a palindrome (41333233314).

The spelling of 21111122202 in words is "twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, two hundred two".