1211120231311 has 8 divisors (see below), whose sum is σ = 1276682050800. Its totient is φ = 1145740276800.

The previous prime is 1211120231309. The next prime is 1211120231327. The reversal of 1211120231311 is 1131320211121.

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 1211120231311 - 2¹ = 1211120231309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211120231351) 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, 45452566 + ... + 45479203.

It is an arithmetic number, because the mean of its divisors is an integer number (159585256350).

Almost surely, 2^{1211120231311} is an apocalyptic number.

1211120231311 is a deficient number, since it is larger than the sum of its proper divisors (65561819489).

1211120231311 is an equidigital number, since it uses as much as digits as its factorization.

1211120231311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90932489.

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

Adding to 1211120231311 its reverse (1131320211121), we get a palindrome (2342440442432).

The spelling of 1211120231311 in words is "one trillion, two hundred eleven billion, one hundred twenty million, two hundred thirty-one thousand, three hundred eleven".