102011210123 has 4 divisors (see below), whose sum is σ = 108011869560. Its totient is φ = 96010550688.

The previous prime is 102011210053. The next prime is 102011210141. The reversal of 102011210123 is 321012110201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321012110201 = 397217 ⋅808153.

It is a cyclic number.

It is not a de Polignac number, because 102011210123 - 2¹⁸ = 102010947979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102011210098 and 102011210107.

It is not an unprimeable number, because it can be changed into a prime (102011210143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3000329693 + ... + 3000329726.

It is an arithmetic number, because the mean of its divisors is an integer number (27002967390).

Almost surely, 2^102011210123 is an apocalyptic number.

102011210123 is a deficient number, since it is larger than the sum of its proper divisors (6000659437).

102011210123 is an equidigital number, since it uses as much as digits as its factorization.

102011210123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000659436.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 102011210123 its reverse (321012110201), we get a palindrome (423023320324).

The spelling of 102011210123 in words is "one hundred two billion, eleven million, two hundred ten thousand, one hundred twenty-three".