213021002 has 4 divisors (see below), whose sum is σ = 319531506. Its totient is φ = 106510500.

The previous prime is 213021001. The next prime is 213021013. The reversal of 213021002 is 200120312.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 179854921 + 33166081 = 13411^2 + 5759^2 .

It is not an unprimeable number, because it can be changed into a prime (213021001) 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 as a sum of consecutive naturals, namely, 53255249 + ... + 53255252.

Almost surely, 2^213021002 is an apocalyptic number.

213021002 is a deficient number, since it is larger than the sum of its proper divisors (106510504).

213021002 is a wasteful number, since it uses less digits than its factorization.

213021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106510503.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 213021002 is about 14595.2390182552. The cubic root of 213021002 is about 597.2288898022.

Adding to 213021002 its reverse (200120312), we get a palindrome (413141314).

It can be divided in two parts, 2130 and 21002, that added together give a palindrome (23132).

The spelling of 213021002 in words is "two hundred thirteen million, twenty-one thousand, two".