21214040434120 has 32 divisors (see below), whose sum is σ = 47737390720320. Its totient is φ = 8484585108160.

The previous prime is 21214040434079. The next prime is 21214040434121. The reversal of 21214040434120 is 2143404041212.

It is not an unprimeable number, because it can be changed into a prime (21214040434121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31887442 + ... + 32545921.

It is an arithmetic number, because the mean of its divisors is an integer number (1491793460010).

Almost surely, 2^{21214040434120} is an apocalyptic number.

21214040434120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21214040434120 is an abundant number, since it is smaller than the sum of its proper divisors (26523350286200).

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

21214040434120 is a wasteful number, since it uses less digits than its factorization.

21214040434120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64441605 (or 64441601 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21214040434120 its reverse (2143404041212), we get a palindrome (23357444475332).

The spelling of 21214040434120 in words is "twenty-one trillion, two hundred fourteen billion, forty million, four hundred thirty-four thousand, one hundred twenty".