210010101221 has 8 divisors (see below), whose sum is σ = 210208462464. Its totient is φ = 209811798720.

The previous prime is 210010101193. The next prime is 210010101229. The reversal of 210010101221 is 122101010012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210010101221 - 2³⁴ = 192830232037 is a prime.

It is a super-2 number, since 2×210010101221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210010101229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10509986 + ... + 10529948.

It is an arithmetic number, because the mean of its divisors is an integer number (26276057808).

Almost surely, 2^210010101221 is an apocalyptic number.

It is an amenable number.

210010101221 is a deficient number, since it is larger than the sum of its proper divisors (198361243).

210010101221 is a wasteful number, since it uses less digits than its factorization.

210010101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29371.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210010101221 its reverse (122101010012), we get a palindrome (332111111233).

The spelling of 210010101221 in words is "two hundred ten billion, ten million, one hundred one thousand, two hundred twenty-one".