123550021122 has 128 divisors (see below), whose sum is σ = 282319810560. Its totient is φ = 35721354240.

The previous prime is 123550021121. The next prime is 123550021141. The reversal of 123550021122 is 221120055321.

It is a super-3 number, since 3×123550021122³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 123550021092 and 123550021101.

It is not an unprimeable number, because it can be changed into a prime (123550021121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18511578 + ... + 18518250.

It is an arithmetic number, because the mean of its divisors is an integer number (2205623520).

Almost surely, 2^123550021122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123550021122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141159905280).

123550021122 is an abundant number, since it is smaller than the sum of its proper divisors (158769789438).

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

123550021122 is a wasteful number, since it uses less digits than its factorization.

123550021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6888.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 123550021122 its reverse (221120055321), we get a palindrome (344670076443).

The spelling of 123550021122 in words is "one hundred twenty-three billion, five hundred fifty million, twenty-one thousand, one hundred twenty-two".