2012131301221 has 2 divisors, whose sum is σ = 2012131301222. Its totient is φ = 2012131301220.

The previous prime is 2012131301129. The next prime is 2012131301233. The reversal of 2012131301221 is 1221031312102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1207855950625 + 804275350596 = 1099025^2 + 896814^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012131301221 - 2²¹ = 2012129204069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012131301281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006065650610 + 1006065650611.

It is an arithmetic number, because the mean of its divisors is an integer number (1006065650611).

Almost surely, 2^{2012131301221} is an apocalyptic number.

It is an amenable number.

2012131301221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012131301221 is an equidigital number, since it uses as much as digits as its factorization.

2012131301221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2012131301221 its reverse (1221031312102), we get a palindrome (3233162613323).

The spelling of 2012131301221 in words is "two trillion, twelve billion, one hundred thirty-one million, three hundred one thousand, two hundred twenty-one".