102042021 has 8 divisors (see below), whose sum is σ = 136209024. Its totient is φ = 67951520.

The previous prime is 102042019. The next prime is 102042037. The reversal of 102042021 is 120240201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102042021 - 2¹ = 102042019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102041988 and 102042006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102042001) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 15936 + ... + 21401.

It is an arithmetic number, because the mean of its divisors is an integer number (17026128).

Almost surely, 2^102042021 is an apocalyptic number.

It is an amenable number.

102042021 is a deficient number, since it is larger than the sum of its proper divisors (34167003).

102042021 is an equidigital number, since it uses as much as digits as its factorization.

102042021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38251.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 102042021 is about 10101.5850736407. The cubic root of 102042021 is about 467.2970260937.

Adding to 102042021 its reverse (120240201), we get a palindrome (222282222).

The spelling of 102042021 in words is "one hundred two million, forty-two thousand, twenty-one".