2001121022111 has 2 divisors, whose sum is σ = 2001121022112. Its totient is φ = 2001121022110.

The previous prime is 2001121022059. The next prime is 2001121022183. The reversal of 2001121022111 is 1112201211002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001121022111 - 2¹⁰ = 2001121021087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001121052111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000560511055 + 1000560511056.

It is an arithmetic number, because the mean of its divisors is an integer number (1000560511056).

Almost surely, 2^{2001121022111} is an apocalyptic number.

2001121022111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001121022111 is an equidigital number, since it uses as much as digits as its factorization.

2001121022111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2001121022111 its reverse (1112201211002), we get a palindrome (3113322233113).

The spelling of 2001121022111 in words is "two trillion, one billion, one hundred twenty-one million, twenty-two thousand, one hundred eleven".