101243047440 has 40 divisors (see below), whose sum is σ = 313853447808. Its totient is φ = 26998145920.

The previous prime is 101243047427. The next prime is 101243047441. The reversal of 101243047440 is 44740342101.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 101243047398 and 101243047407.

It is not an unprimeable number, because it can be changed into a prime (101243047441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210922776 + ... + 210923255.

Almost surely, 2^101243047440 is an apocalyptic number.

101243047440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101243047440 is an abundant number, since it is smaller than the sum of its proper divisors (212610400368).

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

101243047440 is a wasteful number, since it uses less digits than its factorization.

101243047440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421846047 (or 421846041 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

Adding to 101243047440 its reverse (44740342101), we get a palindrome (145983389541).

The spelling of 101243047440 in words is "one hundred one billion, two hundred forty-three million, forty-seven thousand, four hundred forty".