201021210210004 has 6 divisors (see below), whose sum is σ = 351787117867514. Its totient is φ = 100510605105000.

The previous prime is 201021210210001. The next prime is 201021210210017. The reversal of 201021210210004 is 400012012120102.

It can be written as a sum of positive squares in only one way, i.e., 195359380318404 + 5661829891600 = 13977102^2 + 2379460^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 201021210210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021210210001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25127651276247 + ... + 25127651276254.

Almost surely, 2^{201021210210004} is an apocalyptic number.

It is an amenable number.

201021210210004 is a deficient number, since it is larger than the sum of its proper divisors (150765907657510).

201021210210004 is a wasteful number, since it uses less digits than its factorization.

201021210210004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50255302552505 (or 50255302552503 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201021210210004 its reverse (400012012120102), we get a palindrome (601033222330106).

The spelling of 201021210210004 in words is "two hundred one trillion, twenty-one billion, two hundred ten million, two hundred ten thousand, four".