102240124040 has 96 divisors (see below), whose sum is σ = 243586284480. Its totient is φ = 38615750784.

The previous prime is 102240124033. The next prime is 102240124043. The reversal of 102240124040 is 40421042201.

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

It is not an unprimeable number, because it can be changed into a prime (102240124043) 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, 4421549 + ... + 4444611.

It is an arithmetic number, because the mean of its divisors is an integer number (2537357130).

Almost surely, 2^102240124040 is an apocalyptic number.

102240124040 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 102240124040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121793142240).

102240124040 is an abundant number, since it is smaller than the sum of its proper divisors (141346160440).

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

102240124040 is a wasteful number, since it uses less digits than its factorization.

102240124040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23419 (or 23396 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 102240124040 its reverse (40421042201), we get a palindrome (142661166241).

The spelling of 102240124040 in words is "one hundred two billion, two hundred forty million, one hundred twenty-four thousand, forty".