211211220010123 has 2 divisors, whose sum is σ = 211211220010124. Its totient is φ = 211211220010122.

The previous prime is 211211220010097. The next prime is 211211220010151. The reversal of 211211220010123 is 321010022112112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211211220010123 - 2³³ = 211202630075531 is a prime.

It is a super-2 number, since 2×211211220010123² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211211220010123.

It is not a weakly prime, because it can be changed into another prime (211211220010183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605610005061 + 105605610005062.

It is an arithmetic number, because the mean of its divisors is an integer number (105605610005062).

Almost surely, 2^{211211220010123} is an apocalyptic number.

211211220010123 is a deficient number, since it is larger than the sum of its proper divisors (1).

211211220010123 is an equidigital number, since it uses as much as digits as its factorization.

211211220010123 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 19.

Adding to 211211220010123 its reverse (321010022112112), we get a palindrome (532221242122235).

The spelling of 211211220010123 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twenty million, ten thousand, one hundred twenty-three".