210201212010221 has 4 divisors (see below), whose sum is σ = 211735527426492. Its totient is φ = 208666896593952.

The previous prime is 210201212010073. The next prime is 210201212010233. The reversal of 210201212010221 is 122010212102012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46744705740100 + 163456506270121 = 6837010^2 + 12785011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210201212010221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210201212010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210201212010271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767157707930 + ... + 767157708203.

It is an arithmetic number, because the mean of its divisors is an integer number (52933881856623).

Almost surely, 2^{210201212010221} is an apocalyptic number.

It is an amenable number.

210201212010221 is a deficient number, since it is larger than the sum of its proper divisors (1534315416271).

210201212010221 is a wasteful number, since it uses less digits than its factorization.

210201212010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534315416270.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210201212010221 its reverse (122010212102012), we get a palindrome (332211424112233).

The spelling of 210201212010221 in words is "two hundred ten trillion, two hundred one billion, two hundred twelve million, ten thousand, two hundred twenty-one".