1131220011021 has 16 divisors (see below), whose sum is σ = 1510562439936. Its totient is φ = 753012965376.

The previous prime is 1131220011017. The next prime is 1131220011041. The reversal of 1131220011021 is 1201100221311.

It is not a de Polignac number, because 1131220011021 - 2² = 1131220011017 is a prime.

It is a super-2 number, since 2×1131220011021² (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 (1131220011041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5372301 + ... + 5578893.

It is an arithmetic number, because the mean of its divisors is an integer number (94410152496).

Almost surely, 2^{1131220011021} is an apocalyptic number.

It is an amenable number.

1131220011021 is a deficient number, since it is larger than the sum of its proper divisors (379342428915).

1131220011021 is a wasteful number, since it uses less digits than its factorization.

1131220011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209332.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1131220011021 its reverse (1201100221311), we get a palindrome (2332320232332).

The spelling of 1131220011021 in words is "one trillion, one hundred thirty-one billion, two hundred twenty million, eleven thousand, twenty-one".