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, and also an emirpimes, since its reverse is a distinct semiprime: 12024101 = 23 ⋅522787.
It is a cyclic number.
It is a Duffinian number.
It is a congruent number.
Almost surely, 210142021 is an apocalyptic number.
It is an amenable number.
10142021 is an equidigital number, since it uses as much as digits as its factorization.
10142021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 32922.
The square root of 10142021 is about 3184.6539843443. The cubic root of 10142021 is about 216.4585949866.
Adding to 10142021 its reverse (12024101), we get a palindrome (22166122).
The spelling of 10142021 in words is "ten million, one hundred forty-two thousand, twenty-one".