1011223231311 has 16 divisors (see below), whose sum is σ = 1389464231904. Its totient is φ = 653689897344.

The previous prime is 1011223231309. The next prime is 1011223231321. The reversal of 1011223231311 is 1131323221101.

It is not a de Polignac number, because 1011223231311 - 2¹ = 1011223231309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011223231321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15513756 + ... + 15578801.

It is an arithmetic number, because the mean of its divisors is an integer number (86841514494).

Almost surely, 2^{1011223231311} is an apocalyptic number.

1011223231311 is a deficient number, since it is larger than the sum of its proper divisors (378241000593).

1011223231311 is a wasteful number, since it uses less digits than its factorization.

1011223231311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31092890.

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

Adding to 1011223231311 its reverse (1131323221101), we get a palindrome (2142546452412).

It can be divided in two parts, 1011 and 223231311, that added together give a palindrome (223232322).

The spelling of 1011223231311 in words is "one trillion, eleven billion, two hundred twenty-three million, two hundred thirty-one thousand, three hundred eleven".