102123120440 has 64 divisors (see below), whose sum is σ = 251116472160. Its totient is φ = 37068920320.

The previous prime is 102123120431. The next prime is 102123120467. The reversal of 102123120440 is 44021321201.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36734 + ... + 453426.

Almost surely, 2^102123120440 is an apocalyptic number.

102123120440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102123120440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125558236080).

102123120440 is an abundant number, since it is smaller than the sum of its proper divisors (148993351720).

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

102123120440 is a wasteful number, since it uses less digits than its factorization.

102123120440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417272 (or 417268 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 102123120440 its reverse (44021321201), we get a palindrome (146144441641).

The spelling of 102123120440 in words is "one hundred two billion, one hundred twenty-three million, one hundred twenty thousand, four hundred forty".