1131421231121 has 4 divisors (see below), whose sum is σ = 1140058034544. Its totient is φ = 1122784427700.

The previous prime is 1131421231117. The next prime is 1131421231123. The reversal of 1131421231121 is 1211321241311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1131421231121 - 2² = 1131421231117 is a prime.

It is a super-2 number, since 2×1131421231121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131421231123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4318401515 + ... + 4318401776.

It is an arithmetic number, because the mean of its divisors is an integer number (285014508636).

Almost surely, 2^{1131421231121} is an apocalyptic number.

It is an amenable number.

1131421231121 is a deficient number, since it is larger than the sum of its proper divisors (8636803423).

1131421231121 is an equidigital number, since it uses as much as digits as its factorization.

1131421231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8636803422.

The product of its digits is 288, while the sum is 23.

Adding to 1131421231121 its reverse (1211321241311), we get a palindrome (2342742472432).

The spelling of 1131421231121 in words is "one trillion, one hundred thirty-one billion, four hundred twenty-one million, two hundred thirty-one thousand, one hundred twenty-one".