211311420140 has 12 divisors (see below), whose sum is σ = 443753982336. Its totient is φ = 84524568048.

The previous prime is 211311420109. The next prime is 211311420169. The reversal of 211311420140 is 41024113112.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10565571007 = 211311420140 / (2 + 1 + 1 + 3 + 1 + 1 + 4 + 2 + 0 + 1 + 4 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5282785484 + ... + 5282785523.

It is an arithmetic number, because the mean of its divisors is an integer number (36979498528).

Almost surely, 2^211311420140 is an apocalyptic number.

211311420140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211311420140 is an abundant number, since it is smaller than the sum of its proper divisors (232442562196).

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

211311420140 is a wasteful number, since it uses less digits than its factorization.

211311420140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10565571016 (or 10565571014 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 211311420140 its reverse (41024113112), we get a palindrome (252335533252).

The spelling of 211311420140 in words is "two hundred eleven billion, three hundred eleven million, four hundred twenty thousand, one hundred forty".