2101311211230 has 288 divisors, whose sum is σ = 7234602905088. Its totient is φ = 417651696000.

The previous prime is 2101311211199. The next prime is 2101311211231. The reversal of 2101311211230 is 321121131012.

2101311211230 is a `hidden beast` number, since 2 + 101 + 311 + 21 + 1 + 230 = 666.

It is a super-2 number, since 2×2101311211230² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101311211231) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 174055 + ... + 2057405.

It is an arithmetic number, because the mean of its divisors is an integer number (25120148976).

Almost surely, 2^{2101311211230} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2101311211230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3617301452544).

2101311211230 is an abundant number, since it is smaller than the sum of its proper divisors (5133291693858).

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

2101311211230 is a wasteful number, since it uses less digits than its factorization.

2101311211230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883412 (or 1883402 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 2101311211230 its reverse (321121131012), we get a palindrome (2422432342242).

The spelling of 2101311211230 in words is "two trillion, one hundred one billion, three hundred eleven million, two hundred eleven thousand, two hundred thirty".