2113031221061 has 2 divisors, whose sum is σ = 2113031221062. Its totient is φ = 2113031221060.

The previous prime is 2113031220997. The next prime is 2113031221177. The reversal of 2113031221061 is 1601221303112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1264992828961 + 848038392100 = 1124719^2 + 920890^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113031221061 - 2⁶ = 2113031220997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113031221261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056515610530 + 1056515610531.

It is an arithmetic number, because the mean of its divisors is an integer number (1056515610531).

Almost surely, 2^{2113031221061} is an apocalyptic number.

It is an amenable number.

2113031221061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113031221061 is an equidigital number, since it uses as much as digits as its factorization.

2113031221061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 2113031221061 its reverse (1601221303112), we get a palindrome (3714252524173).

The spelling of 2113031221061 in words is "two trillion, one hundred thirteen billion, thirty-one million, two hundred twenty-one thousand, sixty-one".