101215250440 has 64 divisors (see below), whose sum is σ = 233012194560. Its totient is φ = 39558182400.

The previous prime is 101215250401. The next prime is 101215250489. The reversal of 101215250440 is 44052512101.

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, 150465 + ... + 474415.

It is an arithmetic number, because the mean of its divisors is an integer number (3640815540).

Almost surely, 2^101215250440 is an apocalyptic number.

101215250440 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 101215250440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116506097280).

101215250440 is an abundant number, since it is smaller than the sum of its proper divisors (131796944120).

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

101215250440 is a wasteful number, since it uses less digits than its factorization.

101215250440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324142 (or 324138 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 101215250440 its reverse (44052512101), we get a palindrome (145267762541).

The spelling of 101215250440 in words is "one hundred one billion, two hundred fifteen million, two hundred fifty thousand, four hundred forty".