1210102002221 has 24 divisors (see below), whose sum is σ = 1491727398840. Its totient is φ = 977037734400.

The previous prime is 1210102002211. The next prime is 1210102002233. The reversal of 1210102002221 is 1222002010121.

It can be written as a sum of positive squares in 4 ways, for example, as 268338504196 + 941763498025 = 518014^2 + 970445^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1210102002221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210102002196 and 1210102002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210102002211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10326920 + ... + 10443441.

It is an arithmetic number, because the mean of its divisors is an integer number (62155308285).

Almost surely, 2^{1210102002221} is an apocalyptic number.

It is an amenable number.

1210102002221 is a deficient number, since it is larger than the sum of its proper divisors (281625396619).

1210102002221 is a wasteful number, since it uses less digits than its factorization.

1210102002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20770445 (or 20770438 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1210102002221 its reverse (1222002010121), we get a palindrome (2432104012342).

The spelling of 1210102002221 in words is "one trillion, two hundred ten billion, one hundred two million, two thousand, two hundred twenty-one".