102021293 has 4 divisors (see below), whose sum is σ = 111295968. Its totient is φ = 92746620.

The previous prime is 102021289. The next prime is 102021299. The reversal of 102021293 is 392120201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102021293 - 2² = 102021289 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021299) 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 in 3 ways as a sum of consecutive naturals, for example, 4637321 + ... + 4637342.

It is an arithmetic number, because the mean of its divisors is an integer number (27823992).

Almost surely, 2^102021293 is an apocalyptic number.

It is an amenable number.

102021293 is a deficient number, since it is larger than the sum of its proper divisors (9274675).

102021293 is an equidigital number, since it uses as much as digits as its factorization.

102021293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9274674.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 102021293 is about 10100.5590439342. The cubic root of 102021293 is about 467.2653829576.

Adding to 102021293 its reverse (392120201), we get a palindrome (494141494).

The spelling of 102021293 in words is "one hundred two million, twenty-one thousand, two hundred ninety-three".