195122111022820 has 24 divisors (see below), whose sum is σ = 409757766364800. Its totient is φ = 78048590463072.

The previous prime is 195122111022767. The next prime is 195122111022821. The reversal of 195122111022820 is 28220111221591.

It is a self number, because there is not a number n which added to its sum of digits gives 195122111022820.

It is not an unprimeable number, because it can be changed into a prime (195122111022821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9508860 + ... + 21924019.

It is an arithmetic number, because the mean of its divisors is an integer number (17073240265200).

Almost surely, 2^{195122111022820} is an apocalyptic number.

195122111022820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195122111022820 is an abundant number, since it is smaller than the sum of its proper divisors (214635655341980).

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

195122111022820 is a wasteful number, since it uses less digits than its factorization.

195122111022820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31743267 (or 31743265 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 37.

The spelling of 195122111022820 in words is "one hundred ninety-five trillion, one hundred twenty-two billion, one hundred eleven million, twenty-two thousand, eight hundred twenty".