122155500 has 192 divisors, whose sum is σ = 382427136. Its totient is φ = 30240000.

The previous prime is 122155487. The next prime is 122155519. The reversal of 122155500 is 5551221.

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 63 ways as a sum of consecutive naturals, for example, 1720465 + ... + 1720535.

It is an arithmetic number, because the mean of its divisors is an integer number (1991808).

Almost surely, 2^122155500 is an apocalyptic number.

122155500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122155500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191213568).

122155500 is an abundant number, since it is smaller than the sum of its proper divisors (260271636).

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

122155500 is a wasteful number, since it uses less digits than its factorization.

122155500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 122155500 is about 11052.3979298612. The cubic root of 122155500 is about 496.1781953816.

It can be divided in two parts, 12 and 2155500, that added together give a palindrome (2155512).

The spelling of 122155500 in words is "one hundred twenty-two million, one hundred fifty-five thousand, five hundred".