21211114240 has 36 divisors (see below), whose sum is σ = 50807250144. Its totient is φ = 8484445184.

The previous prime is 21211114229. The next prime is 21211114273. The reversal of 21211114240 is 4241111212.

It is a happy number.

It is a super-2 number, since 2×21211114240² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8284312 + ... + 8286871.

It is an arithmetic number, because the mean of its divisors is an integer number (1411312504).

Almost surely, 2^21211114240 is an apocalyptic number.

21211114240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21211114240 is an abundant number, since it is smaller than the sum of its proper divisors (29596135904).

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

21211114240 is an equidigital number, since it uses as much as digits as its factorization.

21211114240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16571204 (or 16571190 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21211114240 its reverse (4241111212), we get a palindrome (25452225452).

The spelling of 21211114240 in words is "twenty-one billion, two hundred eleven million, one hundred fourteen thousand, two hundred forty".