102123421031 has 4 divisors (see below), whose sum is σ = 102274268712. Its totient is φ = 101972573352.

The previous prime is 102123420991. The next prime is 102123421079. The reversal of 102123421031 is 130124321201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130124321201 = 7 ⋅18589188743.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102123421031 is a prime.

It is a super-2 number, since 2×102123421031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102123420994 and 102123421012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102123471031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75422825 + ... + 75424178.

It is an arithmetic number, because the mean of its divisors is an integer number (25568567178).

Almost surely, 2^102123421031 is an apocalyptic number.

102123421031 is a deficient number, since it is larger than the sum of its proper divisors (150847681).

102123421031 is an equidigital number, since it uses as much as digits as its factorization.

102123421031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150847680.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 102123421031 its reverse (130124321201), we get a palindrome (232247742232).

The spelling of 102123421031 in words is "one hundred two billion, one hundred twenty-three million, four hundred twenty-one thousand, thirty-one".