1331201022111 has 24 divisors (see below), whose sum is σ = 1974979048224. Its totient is φ = 863409896640.

The previous prime is 1331201022103. The next prime is 1331201022131. The reversal of 1331201022111 is 1112201021331.

1331201022111 is a `hidden beast` number, since 1 + 331 + 20 + 102 + 211 + 1 = 666.

It is not a de Polignac number, because 1331201022111 - 2³ = 1331201022103 is a prime.

It is a super-2 number, since 2×1331201022111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331201022131) 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 23 ways as a sum of consecutive naturals, for example, 3998101 + ... + 4318241.

It is an arithmetic number, because the mean of its divisors is an integer number (82290793676).

Almost surely, 2^{1331201022111} is an apocalyptic number.

1331201022111 is a deficient number, since it is larger than the sum of its proper divisors (643778026113).

1331201022111 is a wasteful number, since it uses less digits than its factorization.

1331201022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332671 (or 332668 counting only the distinct ones).

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

Adding to 1331201022111 its reverse (1112201021331), we get a palindrome (2443402043442).

The spelling of 1331201022111 in words is "one trillion, three hundred thirty-one billion, two hundred one million, twenty-two thousand, one hundred eleven".