123453021342 has 64 divisors (see below), whose sum is σ = 289644461568. Its totient is φ = 34350480000.

The previous prime is 123453021323. The next prime is 123453021359. The reversal of 123453021342 is 243120354321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20217 + ... + 497307.

It is an arithmetic number, because the mean of its divisors is an integer number (4525694712).

Almost surely, 2^123453021342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123453021342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144822230784).

123453021342 is an abundant number, since it is smaller than the sum of its proper divisors (166191440226).

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

123453021342 is a wasteful number, since it uses less digits than its factorization.

123453021342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477265.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 123453021342 its reverse (243120354321), we get a palindrome (366573375663).

The spelling of 123453021342 in words is "one hundred twenty-three billion, four hundred fifty-three million, twenty-one thousand, three hundred forty-two".