210101021222221 has 16 divisors (see below), whose sum is σ = 219584596750848. Its totient is φ = 200788657185600.

The previous prime is 210101021222207. The next prime is 210101021222231. The reversal of 210101021222221 is 122222120101012.

It is not a de Polignac number, because 210101021222221 - 2⁵ = 210101021222189 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 (210101021222231) 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, 11257470 + ... + 23386591.

It is an arithmetic number, because the mean of its divisors is an integer number (13724037296928).

Almost surely, 2^{210101021222221} is an apocalyptic number.

It is an amenable number.

210101021222221 is a deficient number, since it is larger than the sum of its proper divisors (9483575528627).

210101021222221 is a wasteful number, since it uses less digits than its factorization.

210101021222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34646532.

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

Adding to 210101021222221 its reverse (122222120101012), we get a palindrome (332323141323233).

The spelling of 210101021222221 in words is "two hundred ten trillion, one hundred one billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".