122102102550 has 96 divisors (see below), whose sum is σ = 318960835200. Its totient is φ = 30826517760.

The previous prime is 122102102539. The next prime is 122102102561. The reversal of 122102102550 is 55201201221.

It is an interprime number because it is at equal distance from previous prime (122102102539) and next prime (122102102561).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4572337 + ... + 4598963.

It is an arithmetic number, because the mean of its divisors is an integer number (3322508700).

Almost surely, 2^122102102550 is an apocalyptic number.

122102102550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 122102102550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159480417600).

122102102550 is an abundant number, since it is smaller than the sum of its proper divisors (196858732650).

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

122102102550 is a wasteful number, since it uses less digits than its factorization.

122102102550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28270 (or 28265 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 122102102550 its reverse (55201201221), we get a palindrome (177303303771).

The spelling of 122102102550 in words is "one hundred twenty-two billion, one hundred two million, one hundred two thousand, five hundred fifty".