2012011227221 has 2 divisors, whose sum is σ = 2012011227222. Its totient is φ = 2012011227220.

The previous prime is 2012011227211. The next prime is 2012011227223. The reversal of 2012011227221 is 1227221102102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2011248694225 + 762532996 = 1418185^2 + 27614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012011227221 - 2³⁰ = 2010937485397 is a prime.

Together with 2012011227223, 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 (2012011227223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006005613610 + 1006005613611.

It is an arithmetic number, because the mean of its divisors is an integer number (1006005613611).

Almost surely, 2^{2012011227221} is an apocalyptic number.

It is an amenable number.

2012011227221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012011227221 is an equidigital number, since it uses as much as digits as its factorization.

2012011227221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 2012011227221 its reverse (1227221102102), we get a palindrome (3239232329323).

The spelling of 2012011227221 in words is "two trillion, twelve billion, eleven million, two hundred twenty-seven thousand, two hundred twenty-one".