2011020120121 has 2 divisors, whose sum is σ = 2011020120122. Its totient is φ = 2011020120120.

The previous prime is 2011020120113. The next prime is 2011020120233. The reversal of 2011020120121 is 1210210201102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1231957924096 + 779062196025 = 1109936^2 + 882645^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011020120121 - 2³ = 2011020120113 is a prime.

It is not a weakly prime, because it can be changed into another prime (2011020127121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005510060060 + 1005510060061.

It is an arithmetic number, because the mean of its divisors is an integer number (1005510060061).

Almost surely, 2^{2011020120121} is an apocalyptic number.

It is an amenable number.

2011020120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011020120121 is an equidigital number, since it uses as much as digits as its factorization.

2011020120121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2011020120121 its reverse (1210210201102), we get a palindrome (3221230321223).

The spelling of 2011020120121 in words is "two trillion, eleven billion, twenty million, one hundred twenty thousand, one hundred twenty-one".