211020221123 has 2 divisors, whose sum is σ = 211020221124. Its totient is φ = 211020221122.

The previous prime is 211020221099. The next prime is 211020221219. The reversal of 211020221123 is 321122020112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211020221123 - 2¹⁴ = 211020204739 is a prime.

It is a super-2 number, since 2×211020221123² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (211020221023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510110561 + 105510110562.

It is an arithmetic number, because the mean of its divisors is an integer number (105510110562).

Almost surely, 2^211020221123 is an apocalyptic number.

211020221123 is a deficient number, since it is larger than the sum of its proper divisors (1).

211020221123 is an equidigital number, since it uses as much as digits as its factorization.

211020221123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 211020221123 its reverse (321122020112), we get a palindrome (532142241235).

The spelling of 211020221123 in words is "two hundred eleven billion, twenty million, two hundred twenty-one thousand, one hundred twenty-three".