1211011233311 has 8 divisors (see below), whose sum is σ = 1321127317200. Its totient is φ = 1100899175040.

The previous prime is 1211011233301. The next prime is 1211011233329. The reversal of 1211011233311 is 1133321101121.

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 1211011233311 - 2¹⁴ = 1211011216927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211011233301) 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, 359306 + ... + 1597223.

It is an arithmetic number, because the mean of its divisors is an integer number (165140914650).

Almost surely, 2^{1211011233311} is an apocalyptic number.

1211011233311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211011233311 is a deficient number, since it is larger than the sum of its proper divisors (110116083889).

1211011233311 is a wasteful number, since it uses less digits than its factorization.

1211011233311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012809.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1211011233311 its reverse (1133321101121), we get a palindrome (2344332334432).

The spelling of 1211011233311 in words is "one trillion, two hundred eleven billion, eleven million, two hundred thirty-three thousand, three hundred eleven".