1131211212321 has 8 divisors (see below), whose sum is σ = 1508338278720. Its totient is φ = 754112477072.

The previous prime is 1131211212319. The next prime is 1131211212367. The reversal of 1131211212321 is 1232121121311.

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 1131211212321 - 2¹ = 1131211212319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131211212821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6989445 + ... + 7149458.

It is an arithmetic number, because the mean of its divisors is an integer number (188542284840).

Almost surely, 2^{1131211212321} is an apocalyptic number.

It is an amenable number.

1131211212321 is a deficient number, since it is larger than the sum of its proper divisors (377127066399).

1131211212321 is a wasteful number, since it uses less digits than its factorization.

1131211212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14165575.

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

Adding to 1131211212321 its reverse (1232121121311), we get a palindrome (2363332333632).

The spelling of 1131211212321 in words is "one trillion, one hundred thirty-one billion, two hundred eleven million, two hundred twelve thousand, three hundred twenty-one".