1210321331121 has 12 divisors (see below), whose sum is σ = 1877233085232. Its totient is φ = 691612189128.

The previous prime is 1210321331119. The next prime is 1210321331189. The reversal of 1210321331121 is 1211331230121.

It is not a de Polignac number, because 1210321331121 - 2¹ = 1210321331119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1210321331111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4116739075 + ... + 4116739368.

It is an arithmetic number, because the mean of its divisors is an integer number (156436090436).

Almost surely, 2^{1210321331121} is an apocalyptic number.

It is an amenable number.

1210321331121 is a deficient number, since it is larger than the sum of its proper divisors (666911754111).

1210321331121 is an equidigital number, since it uses as much as digits as its factorization.

1210321331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8233478460 (or 8233478453 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1210321331121 its reverse (1211331230121), we get a palindrome (2421652561242).

The spelling of 1210321331121 in words is "one trillion, two hundred ten billion, three hundred twenty-one million, three hundred thirty-one thousand, one hundred twenty-one".