210012011222221 has 16 divisors (see below), whose sum is σ = 226309441881600. Its totient is φ = 193734974403648.

The previous prime is 210012011222173. The next prime is 210012011222333. The reversal of 210012011222221 is 122222110210012.

It is a cyclic number.

It is not a de Polignac number, because 210012011222221 - 2³¹ = 210009863738573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210012011222821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378102735 + ... + 378657763.

It is an arithmetic number, because the mean of its divisors is an integer number (14144340117600).

Almost surely, 2^{210012011222221} is an apocalyptic number.

It is an amenable number.

210012011222221 is a deficient number, since it is larger than the sum of its proper divisors (16297430659379).

210012011222221 is a wasteful number, since it uses less digits than its factorization.

210012011222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573348.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210012011222221 its reverse (122222110210012), we get a palindrome (332234121432233).

The spelling of 210012011222221 in words is "two hundred ten trillion, twelve billion, eleven million, two hundred twenty-two thousand, two hundred twenty-one".