102111122123 has 2 divisors, whose sum is σ = 102111122124. Its totient is φ = 102111122122.

The previous prime is 102111122119. The next prime is 102111122159. The reversal of 102111122123 is 321221111201.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (321221111201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102111122123 - 2² = 102111122119 is a prime.

It is a super-2 number, since 2×102111122123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102111112123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51055561061 + 51055561062.

It is an arithmetic number, because the mean of its divisors is an integer number (51055561062).

Almost surely, 2^102111122123 is an apocalyptic number.

102111122123 is a deficient number, since it is larger than the sum of its proper divisors (1).

102111122123 is an equidigital number, since it uses as much as digits as its factorization.

102111122123 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 102111122123 its reverse (321221111201), we get a palindrome (423332233324).

The spelling of 102111122123 in words is "one hundred two billion, one hundred eleven million, one hundred twenty-two thousand, one hundred twenty-three".