101212231500 has 144 divisors (see below), whose sum is σ = 319751271840. Its totient is φ = 26951011200.

The previous prime is 101212231493. The next prime is 101212231501. The reversal of 101212231500 is 5132212101.

101212231500 is a `hidden beast` number, since 1 + 0 + 12 + 122 + 31 + 500 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (101212231501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3174639 + ... + 3206361.

Almost surely, 2^101212231500 is an apocalyptic number.

101212231500 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 101212231500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159875635920).

101212231500 is an abundant number, since it is smaller than the sum of its proper divisors (218539040340).

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

101212231500 is a wasteful number, since it uses less digits than its factorization.

101212231500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32457 (or 32442 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 101212231500 its reverse (5132212101), we get a palindrome (106344443601).

The spelling of 101212231500 in words is "one hundred one billion, two hundred twelve million, two hundred thirty-one thousand, five hundred".