21201441140 has 96 divisors (see below), whose sum is σ = 50133081600. Its totient is φ = 7465518720.

The previous prime is 21201441119. The next prime is 21201441179. The reversal of 21201441140 is 4114410212.

It is a super-2 number, since 2×21201441140² (a number of 21 digits) contains 22 as substring.

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 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, 857471 + ... + 881849.

It is an arithmetic number, because the mean of its divisors is an integer number (522219600).

Almost surely, 2^21201441140 is an apocalyptic number.

21201441140 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 21201441140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25066540800).

21201441140 is an abundant number, since it is smaller than the sum of its proper divisors (28931640460).

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

21201441140 is a wasteful number, since it uses less digits than its factorization.

21201441140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24525 (or 24523 counting only the distinct ones).

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

Adding to 21201441140 its reverse (4114410212), we get a palindrome (25315851352).

The spelling of 21201441140 in words is "twenty-one billion, two hundred one million, four hundred forty-one thousand, one hundred forty".