31321012011 has 8 divisors (see below), whose sum is σ = 41763918144. Its totient is φ = 20879390280.

The previous prime is 31321012001. The next prime is 31321012027. The reversal of 31321012011 is 11021012313.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31321012011 - 2²¹ = 31318914859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31321012001) 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 7 ways as a sum of consecutive naturals, for example, 262681 + ... + 362826.

It is an arithmetic number, because the mean of its divisors is an integer number (5220489768).

Almost surely, 2^31321012011 is an apocalyptic number.

31321012011 is a deficient number, since it is larger than the sum of its proper divisors (10442906133).

31321012011 is a wasteful number, since it uses less digits than its factorization.

31321012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642201.

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

Adding to 31321012011 its reverse (11021012313), we get a palindrome (42342024324).

It can be divided in two parts, 313210 and 12011, that added together give a triangular number (325221 = T₈₀₆).

The spelling of 31321012011 in words is "thirty-one billion, three hundred twenty-one million, twelve thousand, eleven".