123077222136 has 96 divisors (see below), whose sum is σ = 364397529600. Its totient is φ = 37218150720.

The previous prime is 123077222123. The next prime is 123077222137. The reversal of 123077222136 is 631222770321.

123077222136 is a `hidden beast` number, since 1 + 230 + 77 + 222 + 136 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 123077222136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123077222137) 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, 217155 + ... + 541581.

It is an arithmetic number, because the mean of its divisors is an integer number (3795807600).

Almost surely, 2^123077222136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123077222136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182198764800).

123077222136 is an abundant number, since it is smaller than the sum of its proper divisors (241320307464).

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

123077222136 is a wasteful number, since it uses less digits than its factorization.

123077222136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324929 (or 324922 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

Adding to 123077222136 its reverse (631222770321), we get a palindrome (754299992457).

The spelling of 123077222136 in words is "one hundred twenty-three billion, seventy-seven million, two hundred twenty-two thousand, one hundred thirty-six".