31112121011 has 8 divisors (see below), whose sum is σ = 32266035120. Its totient is φ = 29963612448.

The previous prime is 31112120993. The next prime is 31112121059. The reversal of 31112121011 is 11012121113.

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

It is a cyclic number.

It is not a de Polignac number, because 31112121011 - 2⁶ = 31112120947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31112121071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1339661 + ... + 1362686.

It is an arithmetic number, because the mean of its divisors is an integer number (4033254390).

Almost surely, 2^31112121011 is an apocalyptic number.

31112121011 is a deficient number, since it is larger than the sum of its proper divisors (1153914109).

31112121011 is a wasteful number, since it uses less digits than its factorization.

31112121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702773.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 31112121011 its reverse (11012121113), we get a palindrome (42124242124).

The spelling of 31112121011 in words is "thirty-one billion, one hundred twelve million, one hundred twenty-one thousand, eleven".