211204140140 has 96 divisors (see below), whose sum is σ = 511676694144. Its totient is φ = 71732090880.

The previous prime is 211204140139. The next prime is 211204140187. The reversal of 211204140140 is 41041402112.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6693200 + ... + 6724680.

It is an arithmetic number, because the mean of its divisors is an integer number (5329965564).

Almost surely, 2^211204140140 is an apocalyptic number.

211204140140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211204140140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255838347072).

211204140140 is an abundant number, since it is smaller than the sum of its proper divisors (300472554004).

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

211204140140 is a wasteful number, since it uses less digits than its factorization.

211204140140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31947 (or 31945 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 211204140140 its reverse (41041402112), we get a palindrome (252245542252).

The spelling of 211204140140 in words is "two hundred eleven billion, two hundred four million, one hundred forty thousand, one hundred forty".