122121210195 has 32 divisors (see below), whose sum is σ = 220162199040. Its totient is φ = 64213964640.

The previous prime is 122121210191. The next prime is 122121210221. The reversal of 122121210195 is 591012121221.

It is not a de Polignac number, because 122121210195 - 2² = 122121210191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (122121210191) 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 31 ways as a sum of consecutive naturals, for example, 6360849 + ... + 6380018.

It is an arithmetic number, because the mean of its divisors is an integer number (6880068720).

Almost surely, 2^122121210195 is an apocalyptic number.

122121210195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

122121210195 is a deficient number, since it is larger than the sum of its proper divisors (98040988845).

122121210195 is a wasteful number, since it uses less digits than its factorization.

122121210195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12740952 (or 12740946 counting only the distinct ones).

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

The spelling of 122121210195 in words is "one hundred twenty-two billion, one hundred twenty-one million, two hundred ten thousand, one hundred ninety-five".