210141021 has 4 divisors (see below), whose sum is σ = 280188032. Its totient is φ = 140094012.

The previous prime is 210141017. The next prime is 210141023. The reversal of 210141021 is 120141012.

It is a happy number.

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 not a de Polignac number, because 210141021 - 2² = 210141017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210140988 and 210141006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210141023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35023501 + ... + 35023506.

It is an arithmetic number, because the mean of its divisors is an integer number (70047008).

Almost surely, 2^210141021 is an apocalyptic number.

It is an amenable number.

210141021 is a deficient number, since it is larger than the sum of its proper divisors (70047011).

210141021 is an equidigital number, since it uses as much as digits as its factorization.

210141021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70047010.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 210141021 is about 14496.2416163639. The cubic root of 210141021 is about 594.5252159523.

Adding to 210141021 its reverse (120141012), we get a palindrome (330282033).

Subtracting from 210141021 its reverse (120141012), we obtain a palindrome (90000009).

The spelling of 210141021 in words is "two hundred ten million, one hundred forty-one thousand, twenty-one".