211421422140 has 24 divisors (see below), whose sum is σ = 591979982160. Its totient is φ = 56379045888.

The previous prime is 211421422123. The next prime is 211421422159. The reversal of 211421422140 is 41224124112.

It is a happy number.

211421422140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 211421422140.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1761845125 + ... + 1761845244.

It is an arithmetic number, because the mean of its divisors is an integer number (24665832590).

Almost surely, 2^211421422140 is an apocalyptic number.

211421422140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211421422140 is an abundant number, since it is smaller than the sum of its proper divisors (380558560020).

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

211421422140 is a wasteful number, since it uses less digits than its factorization.

211421422140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3523690381 (or 3523690379 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 211421422140 its reverse (41224124112), we get a palindrome (252645546252).

The spelling of 211421422140 in words is "two hundred eleven billion, four hundred twenty-one million, four hundred twenty-two thousand, one hundred forty".