211220222123 has 2 divisors, whose sum is σ = 211220222124. Its totient is φ = 211220222122.

The previous prime is 211220222119. The next prime is 211220222131. The reversal of 211220222123 is 321222022112.

211220222123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211220222123 - 2² = 211220222119 is a prime.

It is a super-2 number, since 2×211220222123² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 211220222095 and 211220222104.

It is not a weakly prime, because it can be changed into another prime (211220222023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610111061 + 105610111062.

It is an arithmetic number, because the mean of its divisors is an integer number (105610111062).

Almost surely, 2^211220222123 is an apocalyptic number.

211220222123 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220222123 is an equidigital number, since it uses as much as digits as its factorization.

211220222123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 211220222123 its reverse (321222022112), we get a palindrome (532442244235).

The spelling of 211220222123 in words is "two hundred eleven billion, two hundred twenty million, two hundred twenty-two thousand, one hundred twenty-three".