211204023140 has 96 divisors (see below), whose sum is σ = 497420034048. Its totient is φ = 74669040000.

The previous prime is 211204023131. The next prime is 211204023143. The reversal of 211204023140 is 41320402112.

211204023140 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (211204023143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1493705 + ... + 1628975.

It is an arithmetic number, because the mean of its divisors is an integer number (5181458688).

Almost surely, 2^211204023140 is an apocalyptic number.

211204023140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211204023140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248710017024).

211204023140 is an abundant number, since it is smaller than the sum of its proper divisors (286216010908).

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

211204023140 is a wasteful number, since it uses less digits than its factorization.

211204023140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135489 (or 135487 counting only the distinct ones).

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

Adding to 211204023140 its reverse (41320402112), we get a palindrome (252524425252).

The spelling of 211204023140 in words is "two hundred eleven billion, two hundred four million, twenty-three thousand, one hundred forty".