211122304340 has 48 divisors (see below), whose sum is σ = 460648112400. Its totient is φ = 81180782592.

The previous prime is 211122304339. The next prime is 211122304387. The reversal of 211122304340 is 43403221112.

It can be written as a sum of positive squares in 8 ways, for example, as 2176409104 + 208945895236 = 46652^2 + 457106^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 661949 + ... + 927588.

It is an arithmetic number, because the mean of its divisors is an integer number (9596835675).

Almost surely, 2^211122304340 is an apocalyptic number.

211122304340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211122304340 is an abundant number, since it is smaller than the sum of its proper divisors (249525808060).

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

211122304340 is a wasteful number, since it uses less digits than its factorization.

211122304340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589804 (or 1589802 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 211122304340 its reverse (43403221112), we get a palindrome (254525525452).

The spelling of 211122304340 in words is "two hundred eleven billion, one hundred twenty-two million, three hundred four thousand, three hundred forty".