20120010021121 has 2 divisors, whose sum is σ = 20120010021122. Its totient is φ = 20120010021120.

The previous prime is 20120010021071. The next prime is 20120010021179. The reversal of 20120010021121 is 12112001002102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10562916004096 + 9557094017025 = 3250064^2 + 3091455^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120010021121 - 2¹¹ = 20120010019073 is a prime.

It is not a weakly prime, because it can be changed into another prime (20120010021191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060005010560 + 10060005010561.

It is an arithmetic number, because the mean of its divisors is an integer number (10060005010561).

Almost surely, 2^{20120010021121} is an apocalyptic number.

It is an amenable number.

20120010021121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120010021121 is an equidigital number, since it uses as much as digits as its factorization.

20120010021121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20120010021121 its reverse (12112001002102), we get a palindrome (32232011023223).

The spelling of 20120010021121 in words is "twenty trillion, one hundred twenty billion, ten million, twenty-one thousand, one hundred twenty-one".