20110211123 has 2 divisors, whose sum is σ = 20110211124. Its totient is φ = 20110211122.

The previous prime is 20110211089. The next prime is 20110211141. The reversal of 20110211123 is 32111201102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20110211123 - 2¹² = 20110207027 is a prime.

It is a super-2 number, since 2×20110211123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20110211098 and 20110211107.

It is not a weakly prime, because it can be changed into another prime (20110217123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055105561 + 10055105562.

It is an arithmetic number, because the mean of its divisors is an integer number (10055105562).

Almost surely, 2^20110211123 is an apocalyptic number.

20110211123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110211123 is an equidigital number, since it uses as much as digits as its factorization.

20110211123 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 20110211123 its reverse (32111201102), we get a palindrome (52221412225).

The spelling of 20110211123 in words is "twenty billion, one hundred ten million, two hundred eleven thousand, one hundred twenty-three".