31011133543111 has 16 divisors (see below), whose sum is σ = 31438257041664. Its totient is φ = 30586688645184.

The previous prime is 31011133543079. The next prime is 31011133543121. The reversal of 31011133543111 is 11134533111013.

It is a cyclic number.

It is not a de Polignac number, because 31011133543111 - 2⁵ = 31011133543079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31011133543111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011133543121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48167155 + ... + 48806731.

It is an arithmetic number, because the mean of its divisors is an integer number (1964891065104).

Almost surely, 2^{31011133543111} is an apocalyptic number.

31011133543111 is a deficient number, since it is larger than the sum of its proper divisors (427123498553).

31011133543111 is a wasteful number, since it uses less digits than its factorization.

31011133543111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641670.

The product of its (nonzero) digits is 1620, while the sum is 28.

Adding to 31011133543111 its reverse (11134533111013), we get a palindrome (42145666654124).

The spelling of 31011133543111 in words is "thirty-one trillion, eleven billion, one hundred thirty-three million, five hundred forty-three thousand, one hundred eleven".