31223420011 has 8 divisors (see below), whose sum is σ = 35685213920. Its totient is φ = 26761952448.

The previous prime is 31223420003. The next prime is 31223420077. The reversal of 31223420011 is 11002432213.

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 31223420011 - 2³ = 31223420003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31223420911) 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, 178885 + ... + 307321.

It is an arithmetic number, because the mean of its divisors is an integer number (4460651740).

Almost surely, 2^31223420011 is an apocalyptic number.

31223420011 is a deficient number, since it is larger than the sum of its proper divisors (4461793909).

31223420011 is a wasteful number, since it uses less digits than its factorization.

31223420011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163173.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31223420011 its reverse (11002432213), we get a palindrome (42225852224).

The spelling of 31223420011 in words is "thirty-one billion, two hundred twenty-three million, four hundred twenty thousand, eleven".