1311011243031 has 32 divisors (see below), whose sum is σ = 2010676349440. Its totient is φ = 744295982976.

The previous prime is 1311011243027. The next prime is 1311011243107. The reversal of 1311011243031 is 1303421101131.

It is not a de Polignac number, because 1311011243031 - 2² = 1311011243027 is a prime.

It is a super-2 number, since 2×1311011243031² (a number of 25 digits) contains 22 as substring.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311011242989 and 1311011243007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311011243011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42776445 + ... + 42807081.

It is an arithmetic number, because the mean of its divisors is an integer number (62833635920).

Almost surely, 2^{1311011243031} is an apocalyptic number.

1311011243031 is a deficient number, since it is larger than the sum of its proper divisors (699665106409).

1311011243031 is a wasteful number, since it uses less digits than its factorization.

1311011243031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43783.

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

Adding to 1311011243031 its reverse (1303421101131), we get a palindrome (2614432344162).

The spelling of 1311011243031 in words is "one trillion, three hundred eleven billion, eleven million, two hundred forty-three thousand, thirty-one".