2012221011121 has 2 divisors, whose sum is σ = 2012221011122. Its totient is φ = 2012221011120.

The previous prime is 2012221011113. The next prime is 2012221011181. The reversal of 2012221011121 is 1211101222102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1171451216896 + 840769794225 = 1082336^2 + 916935^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012221011121 - 2³ = 2012221011113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012221011095 and 2012221011104.

It is not a weakly prime, because it can be changed into another prime (2012221011181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006110505560 + 1006110505561.

It is an arithmetic number, because the mean of its divisors is an integer number (1006110505561).

Almost surely, 2^{2012221011121} is an apocalyptic number.

It is an amenable number.

2012221011121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012221011121 is an equidigital number, since it uses as much as digits as its factorization.

2012221011121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2012221011121 its reverse (1211101222102), we get a palindrome (3223322233223).

The spelling of 2012221011121 in words is "two trillion, twelve billion, two hundred twenty-one million, eleven thousand, one hundred twenty-one".