31212111200201 has 2 divisors, whose sum is σ = 31212111200202. Its totient is φ = 31212111200200.

The previous prime is 31212111200183. The next prime is 31212111200209. The reversal of 31212111200201 is 10200211121213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22704738972601 + 8507372227600 = 4764949^2 + 2916740^2 .

It is a cyclic number.

It is not a de Polignac number, because 31212111200201 - 2²² = 31212107005897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31212111200201.

It is not a weakly prime, because it can be changed into another prime (31212111200209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606055600100 + 15606055600101.

It is an arithmetic number, because the mean of its divisors is an integer number (15606055600101).

Almost surely, 2^{31212111200201} is an apocalyptic number.

It is an amenable number.

31212111200201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212111200201 is an equidigital number, since it uses as much as digits as its factorization.

31212111200201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 31212111200201 its reverse (10200211121213), we get a palindrome (41412322321414).

The spelling of 31212111200201 in words is "thirty-one trillion, two hundred twelve billion, one hundred eleven million, two hundred thousand, two hundred one".