1311102121031 has 4 divisors (see below), whose sum is σ = 1311137835000. Its totient is φ = 1311066407064.

The previous prime is 1311102121001. The next prime is 1311102121039. The reversal of 1311102121031 is 1301212011131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1311102121031 - 2²² = 1311097926727 is a prime.

It is a super-2 number, since 2×1311102121031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311102121039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17801861 + ... + 17875358.

It is an arithmetic number, because the mean of its divisors is an integer number (327784458750).

Almost surely, 2^{1311102121031} is an apocalyptic number.

1311102121031 is a deficient number, since it is larger than the sum of its proper divisors (35713969).

1311102121031 is an equidigital number, since it uses as much as digits as its factorization.

1311102121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35713968.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1311102121031 its reverse (1301212011131), we get a palindrome (2612314132162).

The spelling of 1311102121031 in words is "one trillion, three hundred eleven billion, one hundred two million, one hundred twenty-one thousand, thirty-one".