211550013131120 has 40 divisors (see below), whose sum is σ = 491894241274464. Its totient is φ = 84613044264192.

The previous prime is 211550013131063. The next prime is 211550013131129. The reversal of 211550013131120 is 21131310055112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 211550013131120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211550013131129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107786804 + ... + 109731923.

Almost surely, 2^{211550013131120} is an apocalyptic number.

211550013131120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211550013131120 is an abundant number, since it is smaller than the sum of its proper divisors (280344228143344).

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

211550013131120 is a wasteful number, since it uses less digits than its factorization.

211550013131120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217530897 (or 217530891 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 26.

Adding to 211550013131120 its reverse (21131310055112), we get a palindrome (232681323186232).

The spelling of 211550013131120 in words is "two hundred eleven trillion, five hundred fifty billion, thirteen million, one hundred thirty-one thousand, one hundred twenty".