1210222210121 has 8 divisors (see below), whose sum is σ = 1282489475400. Its totient is φ = 1139990642560.

The previous prime is 1210222210081. The next prime is 1210222210159. The reversal of 1210222210121 is 1210122220121.

It can be written as a sum of positive squares in 4 ways, for example, as 110263843600 + 1099958366521 = 332060^2 + 1048789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1210222210121 - 2¹⁴ = 1210222193737 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 1210222210121.

It is not an unprimeable number, because it can be changed into a prime (1210222210621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508923206 + ... + 508925583.

It is an arithmetic number, because the mean of its divisors is an integer number (160311184425).

Almost surely, 2^{1210222210121} is an apocalyptic number.

It is an amenable number.

1210222210121 is a deficient number, since it is larger than the sum of its proper divisors (72267265279).

1210222210121 is a wasteful number, since it uses less digits than its factorization.

1210222210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017848859.

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

Adding to 1210222210121 its reverse (1210122220121), we get a palindrome (2420344430242).

The spelling of 1210222210121 in words is "one trillion, two hundred ten billion, two hundred twenty-two million, two hundred ten thousand, one hundred twenty-one".