211331011144 has 32 divisors (see below), whose sum is σ = 436233758400. Its totient is φ = 95178265920.

The previous prime is 211331011141. The next prime is 211331011211. The reversal of 211331011144 is 441110133112.

211331011144 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211331011144² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (211331011141) 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, 11006412 + ... + 11025595.

It is an arithmetic number, because the mean of its divisors is an integer number (13632304950).

Almost surely, 2^211331011144 is an apocalyptic number.

It is an amenable number.

211331011144 is an abundant number, since it is smaller than the sum of its proper divisors (224902747256).

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

211331011144 is a wasteful number, since it uses less digits than its factorization.

211331011144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22032133 (or 22032129 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 211331011144 its reverse (441110133112), we get a palindrome (652441144256).

The spelling of 211331011144 in words is "two hundred eleven billion, three hundred thirty-one million, eleven thousand, one hundred forty-four".