1210222221121 has 4 divisors (see below), whose sum is σ = 1213270640212. Its totient is φ = 1207173802032.

The previous prime is 1210222221077. The next prime is 1210222221127. The reversal of 1210222221121 is 1211222220121.

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 941550012225 + 268672208896 = 970335^2 + 518336^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210222221121 - 2⁹ = 1210222220609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210222221127) 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, 1524208950 + ... + 1524209743.

It is an arithmetic number, because the mean of its divisors is an integer number (303317660053).

Almost surely, 2^{1210222221121} is an apocalyptic number.

It is an amenable number.

1210222221121 is a deficient number, since it is larger than the sum of its proper divisors (3048419091).

1210222221121 is an equidigital number, since it uses as much as digits as its factorization.

1210222221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048419090.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1210222221121 its reverse (1211222220121), we get a palindrome (2421444441242).

The spelling of 1210222221121 in words is "one trillion, two hundred ten billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".