210101101012221 has 8 divisors (see below), whose sum is σ = 282752883605664. Its totient is φ = 138758359546800.

The previous prime is 210101101012217. The next prime is 210101101012333. The reversal of 210101101012221 is 122210101101012.

It is a happy number.

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

It is not a de Polignac number, because 210101101012221 - 2² = 210101101012217 is a prime.

It is a super-2 number, since 2×210101101012221² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 210101101012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210101101012921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327260281630 + ... + 327260282271.

It is an arithmetic number, because the mean of its divisors is an integer number (35344110450708).

Almost surely, 2^{210101101012221} is an apocalyptic number.

It is an amenable number.

210101101012221 is a deficient number, since it is larger than the sum of its proper divisors (72651782593443).

210101101012221 is a wasteful number, since it uses less digits than its factorization.

210101101012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654520564011.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210101101012221 its reverse (122210101101012), we get a palindrome (332311202113233).

The spelling of 210101101012221 in words is "two hundred ten trillion, one hundred one billion, one hundred one million, twelve thousand, two hundred twenty-one".