2011120021061 has 2 divisors, whose sum is σ = 2011120021062. Its totient is φ = 2011120021060.

The previous prime is 2011120021049. The next prime is 2011120021069. The reversal of 2011120021061 is 1601200211102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1349386580161 + 661733440900 = 1161631^2 + 813470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011120021061 is a prime.

It is a super-2 number, since 2×2011120021061² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011120021069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005560010530 + 1005560010531.

It is an arithmetic number, because the mean of its divisors is an integer number (1005560010531).

Almost surely, 2^{2011120021061} is an apocalyptic number.

It is an amenable number.

2011120021061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011120021061 is an equidigital number, since it uses as much as digits as its factorization.

2011120021061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2011120021061 its reverse (1601200211102), we get a palindrome (3612320232163).

The spelling of 2011120021061 in words is "two trillion, eleven billion, one hundred twenty million, twenty-one thousand, sixty-one".