1221320231122 has 16 divisors (see below), whose sum is σ = 1940163486912. Its totient is φ = 575391619440.

The previous prime is 1221320231077. The next prime is 1221320231123. The reversal of 1221320231122 is 2211320231221.

It is a junction number, because it is equal to n+sod(n) for n = 1221320231093 and 1221320231102.

It is not an unprimeable number, because it can be changed into a prime (1221320231123) 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, 198134529 + ... + 198140692.

It is an arithmetic number, because the mean of its divisors is an integer number (121260217932).

Almost surely, 2^{1221320231122} is an apocalyptic number.

1221320231122 is a deficient number, since it is larger than the sum of its proper divisors (718843255790).

1221320231122 is a wasteful number, since it uses less digits than its factorization.

1221320231122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396275313.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1221320231122 its reverse (2211320231221), we get a palindrome (3432640462343).

Subtracting 1221320231122 from its reverse (2211320231221), we obtain a palindrome (990000000099).

The spelling of 1221320231122 in words is "one trillion, two hundred twenty-one billion, three hundred twenty million, two hundred thirty-one thousand, one hundred twenty-two".