102203121 has 16 divisors (see below), whose sum is σ = 138893888. Its totient is φ = 66830400.

The previous prime is 102203111. The next prime is 102203149. The reversal of 102203121 is 121302201.

It is not a de Polignac number, because 102203121 - 2¹³ = 102194929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102203097 and 102203106.

It is not an unprimeable number, because it can be changed into a prime (102203111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99591 + ... + 100611.

It is an arithmetic number, because the mean of its divisors is an integer number (8680868).

Almost surely, 2^102203121 is an apocalyptic number.

It is an amenable number.

102203121 is a deficient number, since it is larger than the sum of its proper divisors (36690767).

102203121 is a wasteful number, since it uses less digits than its factorization.

102203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 102203121 is about 10109.5559249653. Note that the first 3 decimals coincide. The cubic root of 102203121 is about 467.5428136222.

Adding to 102203121 its reverse (121302201), we get a palindrome (223505322).

The spelling of 102203121 in words is "one hundred two million, two hundred three thousand, one hundred twenty-one".