21112220195 has 16 divisors (see below), whose sum is σ = 28280558592. Its totient is φ = 14997262560.

The previous prime is 21112220113. The next prime is 21112220203. The reversal of 21112220195 is 59102221112.

It is not a de Polignac number, because 21112220195 - 2²⁶ = 21045111331 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4461107 + ... + 4465836.

It is an arithmetic number, because the mean of its divisors is an integer number (1767534912).

Almost surely, 2^21112220195 is an apocalyptic number.

21112220195 is a deficient number, since it is larger than the sum of its proper divisors (7168338397).

21112220195 is a wasteful number, since it uses less digits than its factorization.

21112220195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8927002.

The product of its (nonzero) digits is 720, while the sum is 26.

The spelling of 21112220195 in words is "twenty-one billion, one hundred twelve million, two hundred twenty thousand, one hundred ninety-five".