31230120211 has 8 divisors (see below), whose sum is σ = 32391747504. Its totient is φ = 30085207200.

The previous prime is 31230120151. The next prime is 31230120239. The reversal of 31230120211 is 11202103213.

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 31230120211 - 2⁷ = 31230120083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31230120611) 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, 4174765 + ... + 4182238.

It is an arithmetic number, because the mean of its divisors is an integer number (4048968438).

Almost surely, 2^31230120211 is an apocalyptic number.

31230120211 is a deficient number, since it is larger than the sum of its proper divisors (1161627293).

31230120211 is a wasteful number, since it uses less digits than its factorization.

31230120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8357141.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31230120211 its reverse (11202103213), we get a palindrome (42432223424).

The spelling of 31230120211 in words is "thirty-one billion, two hundred thirty million, one hundred twenty thousand, two hundred eleven".