102602221 has 4 divisors (see below), whose sum is σ = 105375292. Its totient is φ = 99829152.

The previous prime is 102602209. The next prime is 102602231. The reversal of 102602221 is 122206201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122206201 = 13 ⋅9400477.

It can be written as a sum of positive squares in 2 ways, for example, as 64224196 + 38378025 = 8014^2 + 6195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102602221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102602195 and 102602204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102602231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1386480 + ... + 1386553.

It is an arithmetic number, because the mean of its divisors is an integer number (26343823).

Almost surely, 2^102602221 is an apocalyptic number.

It is an amenable number.

102602221 is a deficient number, since it is larger than the sum of its proper divisors (2773071).

102602221 is an equidigital number, since it uses as much as digits as its factorization.

102602221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773070.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 102602221 is about 10129.2754429920. The cubic root of 102602221 is about 468.1506032094.

Adding to 102602221 its reverse (122206201), we get a palindrome (224808422).

The spelling of 102602221 in words is "one hundred two million, six hundred two thousand, two hundred twenty-one".