1210101002221 has 4 divisors (see below), whose sum is σ = 1210367021500. Its totient is φ = 1209834982944.

The previous prime is 1210101002191. The next prime is 1210101002237. The reversal of 1210101002221 is 1222001010121.

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 694305562500 + 515795439721 = 833250^2 + 718189^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210101002221 - 2¹³ = 1210100994029 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 (1210101002921) 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, 133002816 + ... + 133011913.

It is an arithmetic number, because the mean of its divisors is an integer number (302591755375).

Almost surely, 2^{1210101002221} is an apocalyptic number.

It is an amenable number.

1210101002221 is a deficient number, since it is larger than the sum of its proper divisors (266019279).

1210101002221 is an equidigital number, since it uses as much as digits as its factorization.

1210101002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266019278.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1210101002221 its reverse (1222001010121), we get a palindrome (2432102012342).

The spelling of 1210101002221 in words is "one trillion, two hundred ten billion, one hundred one million, two thousand, two hundred twenty-one".