1210111000221 has 16 divisors (see below), whose sum is σ = 1708418697984. Its totient is φ = 759273467904.

The previous prime is 1210111000207. The next prime is 1210111000223. The reversal of 1210111000221 is 1220001110121.

It is not a de Polignac number, because 1210111000221 - 2³⁴ = 1192931131037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210111000197 and 1210111000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210111000223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4049085 + ... + 4337661.

It is an arithmetic number, because the mean of its divisors is an integer number (106776168624).

Almost surely, 2^{1210111000221} is an apocalyptic number.

It is an amenable number.

1210111000221 is a deficient number, since it is larger than the sum of its proper divisors (498307697763).

1210111000221 is a wasteful number, since it uses less digits than its factorization.

1210111000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370820.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1210111000221 its reverse (1220001110121), we get a palindrome (2430112110342).

The spelling of 1210111000221 in words is "one trillion, two hundred ten billion, one hundred eleven million, two hundred twenty-one", and thus it is an aban number.