20110130021 has 2 divisors, whose sum is σ = 20110130022. Its totient is φ = 20110130020.

The previous prime is 20110129997. The next prime is 20110130039. The reversal of 20110130021 is 12003101102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13094224900 + 7015905121 = 114430^2 + 83761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110130021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20110129984 and 20110130011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110130041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055065010 + 10055065011.

It is an arithmetic number, because the mean of its divisors is an integer number (10055065011).

Almost surely, 2^20110130021 is an apocalyptic number.

It is an amenable number.

20110130021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110130021 is an equidigital number, since it uses as much as digits as its factorization.

20110130021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20110130021 its reverse (12003101102), we get a palindrome (32113231123).

The spelling of 20110130021 in words is "twenty billion, one hundred ten million, one hundred thirty thousand, twenty-one".