31212211141 has 2 divisors, whose sum is σ = 31212211142. Its totient is φ = 31212211140.

The previous prime is 31212211133. The next prime is 31212211159. The reversal of 31212211141 is 14111221213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18955507041 + 12256704100 = 137679^2 + 110710^2 .

It is an emirp because it is prime and its reverse (14111221213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31212211141 - 2³ = 31212211133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31212214141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606105570 + 15606105571.

It is an arithmetic number, because the mean of its divisors is an integer number (15606105571).

Almost surely, 2^31212211141 is an apocalyptic number.

It is an amenable number.

31212211141 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212211141 is an equidigital number, since it uses as much as digits as its factorization.

31212211141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 19.

Adding to 31212211141 its reverse (14111221213), we get a palindrome (45323432354).

The spelling of 31212211141 in words is "thirty-one billion, two hundred twelve million, two hundred eleven thousand, one hundred forty-one".