212111201123 has 2 divisors, whose sum is σ = 212111201124. Its totient is φ = 212111201122.

The previous prime is 212111201119. The next prime is 212111201161. The reversal of 212111201123 is 321102111212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212111201123 - 2² = 212111201119 is a prime.

It is a super-2 number, since 2×212111201123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212111201023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106055600561 + 106055600562.

It is an arithmetic number, because the mean of its divisors is an integer number (106055600562).

Almost surely, 2^212111201123 is an apocalyptic number.

212111201123 is a deficient number, since it is larger than the sum of its proper divisors (1).

212111201123 is an equidigital number, since it uses as much as digits as its factorization.

212111201123 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 212111201123 its reverse (321102111212), we get a palindrome (533213312335).

The spelling of 212111201123 in words is "two hundred twelve billion, one hundred eleven million, two hundred one thousand, one hundred twenty-three".