1220203111131 has 24 divisors (see below), whose sum is σ = 1854301210944. Its totient is φ = 772178624640.

The previous prime is 1220203111129. The next prime is 1220203111139. The reversal of 1220203111131 is 1311113020221.

1220203111131 is a `hidden beast` number, since 1 + 220 + 2 + 0 + 311 + 1 + 131 = 666.

It is not a de Polignac number, because 1220203111131 - 2¹ = 1220203111129 is a prime.

It is a super-2 number, since 2×1220203111131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220203111139) 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, 44672611 + ... + 44699916.

It is an arithmetic number, because the mean of its divisors is an integer number (77262550456).

Almost surely, 2^{1220203111131} is an apocalyptic number.

1220203111131 is a deficient number, since it is larger than the sum of its proper divisors (634098099813).

1220203111131 is a wasteful number, since it uses less digits than its factorization.

1220203111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89372611 (or 89372608 counting only the distinct ones).

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

Adding to 1220203111131 its reverse (1311113020221), we get a palindrome (2531316131352).

The spelling of 1220203111131 in words is "one trillion, two hundred twenty billion, two hundred three million, one hundred eleven thousand, one hundred thirty-one".