31013212011 has 4 divisors (see below), whose sum is σ = 41350949352. Its totient is φ = 20675474672.

The previous prime is 31013211997. The next prime is 31013212051. The reversal of 31013212011 is 11021231013.

It is a happy number.

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 31013212011 - 2⁷ = 31013211883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31013212051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5168868666 + ... + 5168868671.

It is an arithmetic number, because the mean of its divisors is an integer number (10337737338).

Almost surely, 2^31013212011 is an apocalyptic number.

31013212011 is a deficient number, since it is larger than the sum of its proper divisors (10337737341).

31013212011 is a wasteful number, since it uses less digits than its factorization.

31013212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337737340.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31013212011 its reverse (11021231013), we get a palindrome (42034443024).

The spelling of 31013212011 in words is "thirty-one billion, thirteen million, two hundred twelve thousand, eleven".