21114434541220 has 12 divisors (see below), whose sum is σ = 44340312536604. Its totient is φ = 8445773816480.

The previous prime is 21114434541209. The next prime is 21114434541251. The reversal of 21114434541220 is 2214543441112.

It can be written as a sum of positive squares in 2 ways, for example, as 3387690562624 + 17726743978596 = 1840568^2 + 4210314^2 .

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, 527860863511 + ... + 527860863550.

It is an arithmetic number, because the mean of its divisors is an integer number (3695026044717).

Almost surely, 2^{21114434541220} is an apocalyptic number.

21114434541220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21114434541220 is an abundant number, since it is smaller than the sum of its proper divisors (23225877995384).

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

21114434541220 is a wasteful number, since it uses less digits than its factorization.

21114434541220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055721727070 (or 1055721727068 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

Adding to 21114434541220 its reverse (2214543441112), we get a palindrome (23328977982332).

The spelling of 21114434541220 in words is "twenty-one trillion, one hundred fourteen billion, four hundred thirty-four million, five hundred forty-one thousand, two hundred twenty".