102133421 has 4 divisors (see below), whose sum is σ = 109989852. Its totient is φ = 94276992.

The previous prime is 102133403. The next prime is 102133441. The reversal of 102133421 is 124331201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67158025 + 34975396 = 8195^2 + 5914^2 .

It is a cyclic number.

It is not a de Polignac number, because 102133421 - 2¹⁸ = 101871277 is a prime.

It is a super-3 number, since 3×102133421³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102133421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102133441) 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, 3928196 + ... + 3928221.

It is an arithmetic number, because the mean of its divisors is an integer number (27497463).

Almost surely, 2^102133421 is an apocalyptic number.

It is an amenable number.

102133421 is a deficient number, since it is larger than the sum of its proper divisors (7856431).

102133421 is an equidigital number, since it uses as much as digits as its factorization.

102133421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7856430.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 102133421 is about 10106.1081035184. The cubic root of 102133421 is about 467.4365052413.

Adding to 102133421 its reverse (124331201), we get a palindrome (226464622).

The spelling of 102133421 in words is "one hundred two million, one hundred thirty-three thousand, four hundred twenty-one".