1210221122201 has 36 divisors (see below), whose sum is σ = 1545314806332. Its totient is φ = 944420166144.

The previous prime is 1210221122171. The next prime is 1210221122237. The reversal of 1210221122201 is 1022211220121.

It can be written as a sum of positive squares in 6 ways, for example, as 122956123801 + 1087264998400 = 350651^2 + 1042720^2 .

It is not a de Polignac number, because 1210221122201 - 2²² = 1210216927897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1210221122201.

It is not an unprimeable number, because it can be changed into a prime (1210221121201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 396476 + ... + 1605501.

It is an arithmetic number, because the mean of its divisors is an integer number (42925411287).

Almost surely, 2^{1210221122201} is an apocalyptic number.

It is an amenable number.

1210221122201 is a deficient number, since it is larger than the sum of its proper divisors (335093684131).

1210221122201 is a wasteful number, since it uses less digits than its factorization.

1210221122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002090 (or 2002070 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1210221122201 its reverse (1022211220121), we get a palindrome (2232432342322).

The spelling of 1210221122201 in words is "one trillion, two hundred ten billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred one".