31120000211 has 4 divisors (see below), whose sum is σ = 31238327472. Its totient is φ = 31001672952.

The previous prime is 31120000207. The next prime is 31120000213. The reversal of 31120000211 is 11200002113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31120000211 - 2² = 31120000207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31120000192 and 31120000201.

It is not an unprimeable number, because it can be changed into a prime (31120000213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59163236 + ... + 59163761.

It is an arithmetic number, because the mean of its divisors is an integer number (7809581868).

Almost surely, 2^31120000211 is an apocalyptic number.

31120000211 is a deficient number, since it is larger than the sum of its proper divisors (118327261).

31120000211 is a wasteful number, since it uses less digits than its factorization.

31120000211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118327260.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 31120000211 its reverse (11200002113), we get a palindrome (42320002324).

It can be divided in two parts, 3 and 1120000211, that multiplied together give a palindrome (3360000633).

The spelling of 31120000211 in words is "thirty-one billion, one hundred twenty million, two hundred eleven", and thus it is an aban number.