20011211112149 has 2 divisors, whose sum is σ = 20011211112150. Its totient is φ = 20011211112148.

The previous prime is 20011211112083. The next prime is 20011211112161. The reversal of 20011211112149 is 94121111211002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19999723131025 + 11487981124 = 4472105^2 + 107182^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011211112149 - 2⁴⁴ = 2419025067733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011211112649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005605556074 + 10005605556075.

It is an arithmetic number, because the mean of its divisors is an integer number (10005605556075).

Almost surely, 2^{20011211112149} is an apocalyptic number.

It is an amenable number.

20011211112149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011211112149 is an equidigital number, since it uses as much as digits as its factorization.

20011211112149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 20011211112149 in words is "twenty trillion, eleven billion, two hundred eleven million, one hundred twelve thousand, one hundred forty-nine".