1320222112121 has 16 divisors (see below), whose sum is σ = 1457768906880. Its totient is φ = 1185661774080.

The previous prime is 1320222112091. The next prime is 1320222112129. The reversal of 1320222112121 is 1212112220231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320222112121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320222112093 and 1320222112102.

It is not an unprimeable number, because it can be changed into a prime (1320222112129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1229621 + ... + 2037746.

It is an arithmetic number, because the mean of its divisors is an integer number (91110556680).

Almost surely, 2^{1320222112121} is an apocalyptic number.

1320222112121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1320222112121 is a deficient number, since it is larger than the sum of its proper divisors (137546794759).

1320222112121 is a wasteful number, since it uses less digits than its factorization.

1320222112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267824.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1320222112121 its reverse (1212112220231), we get a palindrome (2532334332352).

The spelling of 1320222112121 in words is "one trillion, three hundred twenty billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twenty-one".