1210220013121 has 4 divisors (see below), whose sum is σ = 1383108586432. Its totient is φ = 1037331439812.

The previous prime is 1210220013073. The next prime is 1210220013151. The reversal of 1210220013121 is 1213100220121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1210220013121 - 2³⁵ = 1175860274753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210220013095 and 1210220013104.

It is not an unprimeable number, because it can be changed into a prime (1210220013151) 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, 86444286645 + ... + 86444286658.

It is an arithmetic number, because the mean of its divisors is an integer number (345777146608).

Almost surely, 2^{1210220013121} is an apocalyptic number.

It is an amenable number.

1210220013121 is a deficient number, since it is larger than the sum of its proper divisors (172888573311).

1210220013121 is an equidigital number, since it uses as much as digits as its factorization.

1210220013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172888573310.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1210220013121 its reverse (1213100220121), we get a palindrome (2423320233242).

The spelling of 1210220013121 in words is "one trillion, two hundred ten billion, two hundred twenty million, thirteen thousand, one hundred twenty-one".