311213112103133 has 4 divisors (see below), whose sum is σ = 311514383267868. Its totient is φ = 310911840938400.

The previous prime is 311213112103121. The next prime is 311213112103141. The reversal of 311213112103133 is 331301211312113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 275870241672964 + 35342870430169 = 16609342^2 + 5944987^2 .

It is a cyclic number.

It is not a de Polignac number, because 311213112103133 - 2³² = 311208817135837 is a prime.

It is a super-2 number, since 2×311213112103133² (a number of 30 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 (311213112103433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150635580818 + ... + 150635582883.

It is an arithmetic number, because the mean of its divisors is an integer number (77878595816967).

Almost surely, 2^{311213112103133} is an apocalyptic number.

It is an amenable number.

311213112103133 is a deficient number, since it is larger than the sum of its proper divisors (301271164735).

311213112103133 is a wasteful number, since it uses less digits than its factorization.

311213112103133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301271164734.

The product of its (nonzero) digits is 972, while the sum is 26.

Adding to 311213112103133 its reverse (331301211312113), we get a palindrome (642514323415246).

The spelling of 311213112103133 in words is "three hundred eleven trillion, two hundred thirteen billion, one hundred twelve million, one hundred three thousand, one hundred thirty-three".