211252113500 has 48 divisors (see below), whose sum is σ = 481434408000. Its totient is φ = 80826891200.

The previous prime is 211252113467. The next prime is 211252113503. The reversal of 211252113500 is 5311252112.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211252113503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9173375 + ... + 9196374.

It is an arithmetic number, because the mean of its divisors is an integer number (10029883500).

Almost surely, 2^211252113500 is an apocalyptic number.

211252113500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211252113500 is an abundant number, since it is smaller than the sum of its proper divisors (270182294500).

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

211252113500 is a wasteful number, since it uses less digits than its factorization.

211252113500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18369791 (or 18369779 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 211252113500 its reverse (5311252112), we get a palindrome (216563365612).

The spelling of 211252113500 in words is "two hundred eleven billion, two hundred fifty-two million, one hundred thirteen thousand, five hundred".