102021224 has 8 divisors (see below), whose sum is σ = 191289810. Its totient is φ = 51010608.

The previous prime is 102021197. The next prime is 102021251. The reversal of 102021224 is 422120201.

It is an interprime number because it is at equal distance from previous prime (102021197) and next prime (102021251).

It can be written as a sum of positive squares in only one way, i.e., 88698724 + 13322500 = 9418^2 + 3650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 102021199 and 102021208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6376319 + ... + 6376334.

Almost surely, 2^102021224 is an apocalyptic number.

It is an amenable number.

102021224 is a deficient number, since it is larger than the sum of its proper divisors (89268586).

102021224 is a wasteful number, since it uses less digits than its factorization.

102021224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12752659 (or 12752655 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 102021224 is about 10100.5556282811. Note that the first 3 decimals coincide. The cubic root of 102021224 is about 467.2652776158.

Adding to 102021224 its reverse (422120201), we get a palindrome (524141425).

The spelling of 102021224 in words is "one hundred two million, twenty-one thousand, two hundred twenty-four".