31213031200061 has 2 divisors, whose sum is σ = 31213031200062. Its totient is φ = 31213031200060.

The previous prime is 31213031200049. The next prime is 31213031200063. The reversal of 31213031200061 is 16000213031213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27866257322500 + 3346773877561 = 5278850^2 + 1829419^2 .

It is a cyclic number.

It is not a de Polignac number, because 31213031200061 - 2¹⁰ = 31213031199037 is a prime.

Together with 31213031200063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31213031200063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606515600030 + 15606515600031.

It is an arithmetic number, because the mean of its divisors is an integer number (15606515600031).

Almost surely, 2^{31213031200061} is an apocalyptic number.

It is an amenable number.

31213031200061 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213031200061 is an equidigital number, since it uses as much as digits as its factorization.

31213031200061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31213031200061 its reverse (16000213031213), we get a palindrome (47213244231274).

The spelling of 31213031200061 in words is "thirty-one trillion, two hundred thirteen billion, thirty-one million, two hundred thousand, sixty-one".