1321120203111 has 24 divisors (see below), whose sum is σ = 2065648101360. Its totient is φ = 834391701072.

The previous prime is 1321120203101. The next prime is 1321120203163. The reversal of 1321120203111 is 1113020211231.

1321120203111 is a `hidden beast` number, since 1 + 321 + 12 + 0 + 20 + 311 + 1 = 666.

It is not a de Polignac number, because 1321120203111 - 2⁶ = 1321120203047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321120203101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67760860 + ... + 67780353.

It is an arithmetic number, because the mean of its divisors is an integer number (86068670890).

Almost surely, 2^{1321120203111} is an apocalyptic number.

1321120203111 is a deficient number, since it is larger than the sum of its proper divisors (744527898249).

1321120203111 is a wasteful number, since it uses less digits than its factorization.

1321120203111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135541260 (or 135541235 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1321120203111 its reverse (1113020211231), we get a palindrome (2434140414342).

The spelling of 1321120203111 in words is "one trillion, three hundred twenty-one billion, one hundred twenty million, two hundred three thousand, one hundred eleven".