2012211121121 has 2 divisors, whose sum is σ = 2012211121122. Its totient is φ = 2012211121120.

The previous prime is 2012211121117. The next prime is 2012211121153. The reversal of 2012211121121 is 1211211122102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1963182090496 + 49029030625 = 1401136^2 + 221425^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012211121121 - 2² = 2012211121117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2012211121121.

It is not a weakly prime, because it can be changed into another prime (2012211121171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006105560560 + 1006105560561.

It is an arithmetic number, because the mean of its divisors is an integer number (1006105560561).

Almost surely, 2^{2012211121121} is an apocalyptic number.

It is an amenable number.

2012211121121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012211121121 is an equidigital number, since it uses as much as digits as its factorization.

2012211121121 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 17.

Adding to 2012211121121 its reverse (1211211122102), we get a palindrome (3223422243223).

The spelling of 2012211121121 in words is "two trillion, twelve billion, two hundred eleven million, one hundred twenty-one thousand, one hundred twenty-one".