21120214124309 has 8 divisors (see below), whose sum is σ = 21144890186808. Its totient is φ = 21095539416000.

The previous prime is 21120214124279. The next prime is 21120214124323. The reversal of 21120214124309 is 90342141202112.

It can be written as a sum of positive squares in 4 ways, for example, as 19693873577284 + 1426340547025 = 4437778^2 + 1194295^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120214124309 is a prime.

It is a super-2 number, since 2×21120214124309² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120214124209) 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, 32758559 + ... + 33397059.

It is an arithmetic number, because the mean of its divisors is an integer number (2643111273351).

Almost surely, 2^{21120214124309} is an apocalyptic number.

It is an amenable number.

21120214124309 is a deficient number, since it is larger than the sum of its proper divisors (24676062499).

21120214124309 is an equidigital number, since it uses as much as digits as its factorization.

21120214124309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677095.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 21120214124309 in words is "twenty-one trillion, one hundred twenty billion, two hundred fourteen million, one hundred twenty-four thousand, three hundred nine".