102121231212123 has 4 divisors (see below), whose sum is σ = 136161641616168. Its totient is φ = 68080820808080.

The previous prime is 102121231212023. The next prime is 102121231212127. The reversal of 102121231212123 is 321212132121201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102121231212123 - 2²⁵ = 102121197657691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102121231212093 and 102121231212102.

It is not an unprimeable number, because it can be changed into a prime (102121231212127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17020205202018 + ... + 17020205202023.

It is an arithmetic number, because the mean of its divisors is an integer number (34040410404042).

Almost surely, 2^{102121231212123} is an apocalyptic number.

102121231212123 is a deficient number, since it is larger than the sum of its proper divisors (34040410404045).

102121231212123 is an equidigital number, since it uses as much as digits as its factorization.

102121231212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34040410404044.

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 102121231212123 its reverse (321212132121201), we get a palindrome (423333363333324).

The spelling of 102121231212123 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred thirty-one million, two hundred twelve thousand, one hundred twenty-three".