20120211113 has 2 divisors, whose sum is σ = 20120211114. Its totient is φ = 20120211112.

The previous prime is 20120211091. The next prime is 20120211131. The reversal of 20120211113 is 31111202102.

Together with next prime (20120211131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19201090624 + 919120489 = 138568^2 + 30317^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120211113 - 2¹⁴ = 20120194729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20120211613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060105556 + 10060105557.

It is an arithmetic number, because the mean of its divisors is an integer number (10060105557).

Almost surely, 2^20120211113 is an apocalyptic number.

It is an amenable number.

20120211113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120211113 is an equidigital number, since it uses as much as digits as its factorization.

20120211113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20120211113 its reverse (31111202102), we get a palindrome (51231413215).

The spelling of 20120211113 in words is "twenty billion, one hundred twenty million, two hundred eleven thousand, one hundred thirteen".