20113233121211 has 2 divisors, whose sum is σ = 20113233121212. Its totient is φ = 20113233121210.

The previous prime is 20113233121109. The next prime is 20113233121217. The reversal of 20113233121211 is 11212133231102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20113233121211 - 2³⁰ = 20112159379387 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20113233121217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056616560605 + 10056616560606.

It is an arithmetic number, because the mean of its divisors is an integer number (10056616560606).

Almost surely, 2^{20113233121211} is an apocalyptic number.

20113233121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113233121211 is an equidigital number, since it uses as much as digits as its factorization.

20113233121211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 20113233121211 its reverse (11212133231102), we get a palindrome (31325366352313).

The spelling of 20113233121211 in words is "twenty trillion, one hundred thirteen billion, two hundred thirty-three million, one hundred twenty-one thousand, two hundred eleven".