102123123211 has 2 divisors, whose sum is σ = 102123123212. Its totient is φ = 102123123210.

The previous prime is 102123123143. The next prime is 102123123217. The reversal of 102123123211 is 112321321201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102123123211 is a prime.

It is not a weakly prime, because it can be changed into another prime (102123123217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51061561605 + 51061561606.

It is an arithmetic number, because the mean of its divisors is an integer number (51061561606).

Almost surely, 2^102123123211 is an apocalyptic number.

102123123211 is a deficient number, since it is larger than the sum of its proper divisors (1).

102123123211 is an equidigital number, since it uses as much as digits as its factorization.

102123123211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 102123123211 its reverse (112321321201), we get a palindrome (214444444412).

The spelling of 102123123211 in words is "one hundred two billion, one hundred twenty-three million, one hundred twenty-three thousand, two hundred eleven".