31232230011211 has 4 divisors (see below), whose sum is σ = 31541460011424. Its totient is φ = 30923000011000.

The previous prime is 31232230011139. The next prime is 31232230011251. The reversal of 31232230011211 is 11211003223213.

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 31232230011211 - 2¹⁷ = 31232229880139 is a prime.

It is a super-3 number, since 3×31232230011211³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31232230011251) 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, 154614999955 + ... + 154615000156.

It is an arithmetic number, because the mean of its divisors is an integer number (7885365002856).

Almost surely, 2^{31232230011211} is an apocalyptic number.

31232230011211 is a deficient number, since it is larger than the sum of its proper divisors (309230000213).

31232230011211 is a wasteful number, since it uses less digits than its factorization.

31232230011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309230000212.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31232230011211 its reverse (11211003223213), we get a palindrome (42443233234424).

The spelling of 31232230011211 in words is "thirty-one trillion, two hundred thirty-two billion, two hundred thirty million, eleven thousand, two hundred eleven".