203131221214213 has 2 divisors, whose sum is σ = 203131221214214. Its totient is φ = 203131221214212.

The previous prime is 203131221214153. The next prime is 203131221214217. The reversal of 203131221214213 is 312412122131302.

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., 158356628144289 + 44774593069924 = 12583983^2 + 6691382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203131221214213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203131221214217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101565610607106 + 101565610607107.

It is an arithmetic number, because the mean of its divisors is an integer number (101565610607107).

Almost surely, 2^{203131221214213} is an apocalyptic number.

It is an amenable number.

203131221214213 is a deficient number, since it is larger than the sum of its proper divisors (1).

203131221214213 is an equidigital number, since it uses as much as digits as its factorization.

203131221214213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 203131221214213 its reverse (312412122131302), we get a palindrome (515543343345515).

The spelling of 203131221214213 in words is "two hundred three trillion, one hundred thirty-one billion, two hundred twenty-one million, two hundred fourteen thousand, two hundred thirteen".