1131121221031 has 8 divisors (see below), whose sum is σ = 1147121985744. Its totient is φ = 1115134130880.

The previous prime is 1131121220923. The next prime is 1131121221037. The reversal of 1131121221031 is 1301221211311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131121221031 - 2¹³ = 1131121212839 is a prime.

It is a super-2 number, since 2×1131121221031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131121221037) 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 7 ways as a sum of consecutive naturals, for example, 3251980 + ... + 3582961.

It is an arithmetic number, because the mean of its divisors is an integer number (143390248218).

Almost surely, 2^{1131121221031} is an apocalyptic number.

1131121221031 is a deficient number, since it is larger than the sum of its proper divisors (16000764713).

1131121221031 is an equidigital number, since it uses as much as digits as its factorization.

1131121221031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6837281.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1131121221031 its reverse (1301221211311), we get a palindrome (2432342432342).

The spelling of 1131121221031 in words is "one trillion, one hundred thirty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, thirty-one".