211100442140 has 48 divisors (see below), whose sum is σ = 507030922944. Its totient is φ = 72321600000.

The previous prime is 211100442083. The next prime is 211100442151. The reversal of 211100442140 is 41244001112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397361 + ... + 761640.

It is an arithmetic number, because the mean of its divisors is an integer number (10563144228).

Almost surely, 2^211100442140 is an apocalyptic number.

211100442140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211100442140 is an abundant number, since it is smaller than the sum of its proper divisors (295930480804).

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

211100442140 is a wasteful number, since it uses less digits than its factorization.

211100442140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160318 (or 1160316 counting only the distinct ones).

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

Adding to 211100442140 its reverse (41244001112), we get a palindrome (252344443252).

The spelling of 211100442140 in words is "two hundred eleven billion, one hundred million, four hundred forty-two thousand, one hundred forty".