211320040140 has 144 divisors (see below), whose sum is σ = 707702800896. Its totient is φ = 50611843200.

The previous prime is 211320040111. The next prime is 211320040171. The reversal of 211320040140 is 41040023112.

211320040140 is a `hidden beast` number, since 21 + 1 + 3 + 200 + 401 + 40 = 666.

It is a super-2 number, since 2×211320040140² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 478596 + ... + 807275.

It is an arithmetic number, because the mean of its divisors is an integer number (4914602784).

Almost surely, 2^211320040140 is an apocalyptic number.

211320040140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211320040140 is an abundant number, since it is smaller than the sum of its proper divisors (496382760756).

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

211320040140 is a wasteful number, since it uses less digits than its factorization.

211320040140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285980 (or 1285975 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 211320040140 its reverse (41040023112), we get a palindrome (252360063252).

The spelling of 211320040140 in words is "two hundred eleven billion, three hundred twenty million, forty thousand, one hundred forty".