211140420320 has 24 divisors (see below), whose sum is σ = 498819243384. Its totient is φ = 84456168064.

The previous prime is 211140420313. The next prime is 211140420353. The reversal of 211140420320 is 23024041112.

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

It is a junction number, because it is equal to n+sod(n) for n = 211140420292 and 211140420301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659813654 + ... + 659813973.

It is an arithmetic number, because the mean of its divisors is an integer number (20784135141).

Almost surely, 2^211140420320 is an apocalyptic number.

211140420320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211140420320 is an abundant number, since it is smaller than the sum of its proper divisors (287678823064).

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

211140420320 is a wasteful number, since it uses less digits than its factorization.

211140420320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319627642 (or 1319627634 counting only the distinct ones).

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

Adding to 211140420320 its reverse (23024041112), we get a palindrome (234164461432).

The spelling of 211140420320 in words is "two hundred eleven billion, one hundred forty million, four hundred twenty thousand, three hundred twenty".