123011122440 has 32 divisors (see below), whose sum is σ = 369033367680. Its totient is φ = 32802965952.

The previous prime is 123011122393. The next prime is 123011122463. The reversal of 123011122440 is 44221110321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512546224 + ... + 512546463.

It is an arithmetic number, because the mean of its divisors is an integer number (11532292740).

Almost surely, 2^123011122440 is an apocalyptic number.

123011122440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123011122440 is an abundant number, since it is smaller than the sum of its proper divisors (246022245240).

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

123011122440 is a wasteful number, since it uses less digits than its factorization.

123011122440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025092701 (or 1025092697 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 123011122440 its reverse (44221110321), we get a palindrome (167232232761).

The spelling of 123011122440 in words is "one hundred twenty-three billion, eleven million, one hundred twenty-two thousand, four hundred forty".