1213222223121 has 16 divisors (see below), whose sum is σ = 1619706748800. Its totient is φ = 807776437248.

The previous prime is 1213222223027. The next prime is 1213222223137.

1213222223121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1213222223121 - 2⁹ = 1213222222609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213222223091 and 1213222223100.

It is not an unprimeable number, because it can be changed into a prime (1213222223021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47832975 + ... + 47858331.

It is an arithmetic number, because the mean of its divisors is an integer number (101231671800).

Almost surely, 2^{1213222223121} is an apocalyptic number.

It is an amenable number.

1213222223121 is a deficient number, since it is larger than the sum of its proper divisors (406484525679).

1213222223121 is a wasteful number, since it uses less digits than its factorization.

1213222223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45208.

The product of its digits is 1152, while the sum is 24.

The spelling of 1213222223121 in words is "one trillion, two hundred thirteen billion, two hundred twenty-two million, two hundred twenty-three thousand, one hundred twenty-one".