211420213040 has 40 divisors (see below), whose sum is σ = 520466821920. Its totient is φ = 79593491456.

The previous prime is 211420213033. The next prime is 211420213051. The reversal of 211420213040 is 40312024112.

It is a tau number, because it is divible by the number of its divisors (40).

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

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 7 ways as a sum of consecutive naturals, for example, 77726660 + ... + 77729379.

It is an arithmetic number, because the mean of its divisors is an integer number (13011670548).

Almost surely, 2^211420213040 is an apocalyptic number.

211420213040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211420213040 is an abundant number, since it is smaller than the sum of its proper divisors (309046608880).

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

211420213040 is a wasteful number, since it uses less digits than its factorization.

211420213040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155456069 (or 155456063 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 211420213040 its reverse (40312024112), we get a palindrome (251732237152).

The spelling of 211420213040 in words is "two hundred eleven billion, four hundred twenty million, two hundred thirteen thousand, forty".