122120191820 has 48 divisors (see below), whose sum is σ = 283598709408. Its totient is φ = 43799016960.

The previous prime is 122120191819. The next prime is 122120191867. The reversal of 122120191820 is 28191021221.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3785939 + ... + 3818058.

It is an arithmetic number, because the mean of its divisors is an integer number (5908306446).

Almost surely, 2^122120191820 is an apocalyptic number.

122120191820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122120191820 is an abundant number, since it is smaller than the sum of its proper divisors (161478517588).

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

122120191820 is a wasteful number, since it uses less digits than its factorization.

122120191820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7604090 (or 7604088 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 122120191820 in words is "one hundred twenty-two billion, one hundred twenty million, one hundred ninety-one thousand, eight hundred twenty".