101172006520 has 64 divisors (see below), whose sum is σ = 253600956000. Its totient is φ = 36067680768.

The previous prime is 101172006511. The next prime is 101172006527. The reversal of 101172006520 is 25600271101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101172006527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3339430 + ... + 3369589.

Almost surely, 2^101172006520 is an apocalyptic number.

101172006520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101172006520 is an abundant number, since it is smaller than the sum of its proper divisors (152428949480).

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

101172006520 is a wasteful number, since it uses less digits than its factorization.

101172006520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6709072 (or 6709068 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 25.

Adding to 101172006520 its reverse (25600271101), we get a palindrome (126772277621).

The spelling of 101172006520 in words is "one hundred one billion, one hundred seventy-two million, six thousand, five hundred twenty".