2111661053 has 2 divisors, whose sum is σ = 2111661054. Its totient is φ = 2111661052.

The previous prime is 2111661011. The next prime is 2111661067. The reversal of 2111661053 is 3501661112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2054174329 + 57486724 = 45323^2 + 7582^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111661053 - 2²² = 2107466749 is a prime.

It is a super-2 number, since 2×2111661053² = 8918224805514137618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111660053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055830526 + 1055830527.

It is an arithmetic number, because the mean of its divisors is an integer number (1055830527).

Almost surely, 2^2111661053 is an apocalyptic number.

It is an amenable number.

2111661053 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111661053 is an equidigital number, since it uses as much as digits as its factorization.

2111661053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 2111661053 is about 45952.8133306330. The cubic root of 2111661053 is about 1282.9450929640.

The spelling of 2111661053 in words is "two billion, one hundred eleven million, six hundred sixty-one thousand, fifty-three".