20110211211023 has 2 divisors, whose sum is σ = 20110211211024. Its totient is φ = 20110211211022.

The previous prime is 20110211211007. The next prime is 20110211211187. The reversal of 20110211211023 is 32011211201102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20110211211023 - 2⁴ = 20110211211007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20110211210992 and 20110211211010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110211216023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055105605511 + 10055105605512.

It is an arithmetic number, because the mean of its divisors is an integer number (10055105605512).

Almost surely, 2^{20110211211023} is an apocalyptic number.

20110211211023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110211211023 is an equidigital number, since it uses as much as digits as its factorization.

20110211211023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20110211211023 its reverse (32011211201102), we get a palindrome (52121422412125).

The spelling of 20110211211023 in words is "twenty trillion, one hundred ten billion, two hundred eleven million, two hundred eleven thousand, twenty-three".