102421031 has 2 divisors, whose sum is σ = 102421032. Its totient is φ = 102421030.

The previous prime is 102421019. The next prime is 102421043. The reversal of 102421031 is 130124201.

It is a balanced prime because it is at equal distance from previous prime (102421019) and next prime (102421043).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102421031 is a prime.

It is a super-2 number, since 2×102421031² = 20980135182205922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 102420997 and 102421015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102421061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51210515 + 51210516.

It is an arithmetic number, because the mean of its divisors is an integer number (51210516).

Almost surely, 2^102421031 is an apocalyptic number.

102421031 is a deficient number, since it is larger than the sum of its proper divisors (1).

102421031 is an equidigital number, since it uses as much as digits as its factorization.

102421031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 102421031 is about 10120.3276132742. The cubic root of 102421031 is about 467.8748645763.

Adding to 102421031 its reverse (130124201), we get a palindrome (232545232).

The spelling of 102421031 in words is "one hundred two million, four hundred twenty-one thousand, thirty-one".