1210102112221 has 4 divisors (see below), whose sum is σ = 1218934974492. Its totient is φ = 1201269249952.

The previous prime is 1210102112113. The next prime is 1210102112231. The reversal of 1210102112221 is 1222112010121.

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 568523540025 + 641578572196 = 754005^2 + 800986^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210102112221 - 2⁹ = 1210102111709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210102112195 and 1210102112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210102112231) 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, 4416430930 + ... + 4416431203.

It is an arithmetic number, because the mean of its divisors is an integer number (304733743623).

Almost surely, 2^{1210102112221} is an apocalyptic number.

It is an amenable number.

1210102112221 is a deficient number, since it is larger than the sum of its proper divisors (8832862271).

1210102112221 is an equidigital number, since it uses as much as digits as its factorization.

1210102112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8832862270.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1210102112221 its reverse (1222112010121), we get a palindrome (2432214122342).

The spelling of 1210102112221 in words is "one trillion, two hundred ten billion, one hundred two million, one hundred twelve thousand, two hundred twenty-one".