211121430140 has 24 divisors (see below), whose sum is σ = 443363640720. Its totient is φ = 84446926848.

The previous prime is 211121430119. The next prime is 211121430151. The reversal of 211121430140 is 41034121112.

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 7 ways as a sum of consecutive naturals, for example, 1920299 + ... + 2027261.

It is an arithmetic number, because the mean of its divisors is an integer number (18473485030).

Almost surely, 2^211121430140 is an apocalyptic number.

211121430140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121430140 is an abundant number, since it is smaller than the sum of its proper divisors (232242210580).

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

211121430140 is a wasteful number, since it uses less digits than its factorization.

211121430140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205661 (or 205659 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 211121430140 its reverse (41034121112), we get a palindrome (252155551252).

The spelling of 211121430140 in words is "two hundred eleven billion, one hundred twenty-one million, four hundred thirty thousand, one hundred forty".