21202210111011 has 32 divisors (see below), whose sum is σ = 29361970324800. Its totient is φ = 13597290178560.

The previous prime is 21202210111001. The next prime is 21202210111063. The reversal of 21202210111011 is 11011101220212.

It is a happy number.

It is not a de Polignac number, because 21202210111011 - 2⁵ = 21202210110979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202210111001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154330231 + ... + 154467551.

It is an arithmetic number, because the mean of its divisors is an integer number (917561572650).

Almost surely, 2^{21202210111011} is an apocalyptic number.

21202210111011 is a deficient number, since it is larger than the sum of its proper divisors (8159760213789).

21202210111011 is a wasteful number, since it uses less digits than its factorization.

21202210111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153079.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21202210111011 its reverse (11011101220212), we get a palindrome (32213311331223).

The spelling of 21202210111011 in words is "twenty-one trillion, two hundred two billion, two hundred ten million, one hundred eleven thousand, eleven".