101100215500 has 96 divisors (see below), whose sum is σ = 235019086848. Its totient is φ = 37861376000.

The previous prime is 101100215479. The next prime is 101100215521. The reversal of 101100215500 is 5512001101.

It is an interprime number because it is at equal distance from previous prime (101100215479) and next prime (101100215521).

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, 1592364 + ... + 1654636.

It is an arithmetic number, because the mean of its divisors is an integer number (2448115488).

Almost surely, 2^101100215500 is an apocalyptic number.

101100215500 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 101100215500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117509543424).

101100215500 is an abundant number, since it is smaller than the sum of its proper divisors (133918871348).

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

101100215500 is a wasteful number, since it uses less digits than its factorization.

101100215500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62500 (or 62488 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 16.

Adding to 101100215500 its reverse (5512001101), we get a palindrome (106612216601).

The spelling of 101100215500 in words is "one hundred one billion, one hundred million, two hundred fifteen thousand, five hundred".