123020222550 has 48 divisors (see below), whose sum is σ = 305598013392. Its totient is φ = 32750784000.

The previous prime is 123020222519. The next prime is 123020222557. The reversal of 123020222550 is 55222020321.

It is a self number, because there is not a number n which added to its sum of digits gives 123020222550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123020222557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 592159 + ... + 772458.

It is an arithmetic number, because the mean of its divisors is an integer number (6366625279).

Almost surely, 2^123020222550 is an apocalyptic number.

123020222550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123020222550 is an abundant number, since it is smaller than the sum of its proper divisors (182577790842).

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

123020222550 is a wasteful number, since it uses less digits than its factorization.

123020222550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365233 (or 1365228 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 123020222550 its reverse (55222020321), we get a palindrome (178242242871).

The spelling of 123020222550 in words is "one hundred twenty-three billion, twenty million, two hundred twenty-two thousand, five hundred fifty".