1131210221001 has 32 divisors (see below), whose sum is σ = 1806220615680. Its totient is φ = 615714141504.

The previous prime is 1131210220999. The next prime is 1131210221003. The reversal of 1131210221001 is 1001220121311.

It is an interprime number because it is at equal distance from previous prime (1131210220999) and next prime (1131210221003).

It is not a de Polignac number, because 1131210221001 - 2¹ = 1131210220999 is a prime.

It is a super-2 number, since 2×1131210221001² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131210221003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4784250 + ... + 5015123.

It is an arithmetic number, because the mean of its divisors is an integer number (56444394240).

Almost surely, 2^{1131210221001} is an apocalyptic number.

It is an amenable number.

1131210221001 is a deficient number, since it is larger than the sum of its proper divisors (675010394679).

1131210221001 is a wasteful number, since it uses less digits than its factorization.

1131210221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9799645.

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

Adding to 1131210221001 its reverse (1001220121311), we get a palindrome (2132430342312).

The spelling of 1131210221001 in words is "one trillion, one hundred thirty-one billion, two hundred ten million, two hundred twenty-one thousand, one".