31222113011 has 8 divisors (see below), whose sum is σ = 33080022864. Its totient is φ = 29366571520.

The previous prime is 31222113007. The next prime is 31222113049. The reversal of 31222113011 is 11031122213.

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 31222113011 - 2² = 31222113007 is a prime.

It is a super-2 number, since 2×31222113011² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31222193011) 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, 564905 + ... + 617706.

It is an arithmetic number, because the mean of its divisors is an integer number (4135002858).

Almost surely, 2^31222113011 is an apocalyptic number.

31222113011 is a deficient number, since it is larger than the sum of its proper divisors (1857909853).

31222113011 is a wasteful number, since it uses less digits than its factorization.

31222113011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184181.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31222113011 its reverse (11031122213), we get a palindrome (42253235224).

The spelling of 31222113011 in words is "thirty-one billion, two hundred twenty-two million, one hundred thirteen thousand, eleven".