21122112195 has 24 divisors (see below), whose sum is σ = 36617724000. Its totient is φ = 11263261056.

The previous prime is 21122112191. The next prime is 21122112203. The reversal of 21122112195 is 59121122112.

It is not a de Polignac number, because 21122112195 - 2² = 21122112191 is a prime.

It is a super-2 number, since 2×21122112195² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122112191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 261391 + ... + 332519.

It is an arithmetic number, because the mean of its divisors is an integer number (1525738500).

Almost surely, 2^21122112195 is an apocalyptic number.

21122112195 is a deficient number, since it is larger than the sum of its proper divisors (15495611805).

21122112195 is a wasteful number, since it uses less digits than its factorization.

21122112195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77739 (or 77736 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The spelling of 21122112195 in words is "twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, one hundred ninety-five".