20120011322221 has 8 divisors (see below), whose sum is σ = 20123322387480. Its totient is φ = 20116700476992.

The previous prime is 20120011322219. The next prime is 20120011322227. The reversal of 20120011322221 is 12222311002102.

It can be written as a sum of positive squares in 4 ways, for example, as 12013953193225 + 8106058128996 = 3466115^2 + 2847114^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20120011322221 - 2¹ = 20120011322219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120011322227) 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, 327161151 + ... + 327222643.

It is an arithmetic number, because the mean of its divisors is an integer number (2515415298435).

Almost surely, 2^{20120011322221} is an apocalyptic number.

It is an amenable number.

20120011322221 is a deficient number, since it is larger than the sum of its proper divisors (3311065259).

20120011322221 is an equidigital number, since it uses as much as digits as its factorization.

20120011322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110015.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20120011322221 its reverse (12222311002102), we get a palindrome (32342322324323).

The spelling of 20120011322221 in words is "twenty trillion, one hundred twenty billion, eleven million, three hundred twenty-two thousand, two hundred twenty-one".