1121212131321 has 4 divisors (see below), whose sum is σ = 1494949508432. Its totient is φ = 747474754212.

The previous prime is 1121212131239. The next prime is 1121212131419. The reversal of 1121212131321 is 1231312121211.

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 not a de Polignac number, because 1121212131321 - 2¹⁴ = 1121212114937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1121212131421) 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, 186868688551 + ... + 186868688556.

It is an arithmetic number, because the mean of its divisors is an integer number (373737377108).

Almost surely, 2^{1121212131321} is an apocalyptic number.

It is an amenable number.

1121212131321 is a deficient number, since it is larger than the sum of its proper divisors (373737377111).

1121212131321 is an equidigital number, since it uses as much as digits as its factorization.

1121212131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373737377110.

The product of its digits is 144, while the sum is 21.

Adding to 1121212131321 its reverse (1231312121211), we get a palindrome (2352524252532).

The spelling of 1121212131321 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, one hundred thirty-one thousand, three hundred twenty-one".