2012113131221 has 2 divisors, whose sum is σ = 2012113131222. Its totient is φ = 2012113131220.

The previous prime is 2012113131211. The next prime is 2012113131229. The reversal of 2012113131221 is 1221313112102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2007211731121 + 4901400100 = 1416761^2 + 70010^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012113131221 - 2¹⁸ = 2012112869077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012113131193 and 2012113131202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012113131229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006056565610 + 1006056565611.

It is an arithmetic number, because the mean of its divisors is an integer number (1006056565611).

Almost surely, 2^{2012113131221} is an apocalyptic number.

It is an amenable number.

2012113131221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012113131221 is an equidigital number, since it uses as much as digits as its factorization.

2012113131221 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 20.

Adding to 2012113131221 its reverse (1221313112102), we get a palindrome (3233426243323).

The spelling of 2012113131221 in words is "two trillion, twelve billion, one hundred thirteen million, one hundred thirty-one thousand, two hundred twenty-one".