201656630111 has 2 divisors, whose sum is σ = 201656630112. Its totient is φ = 201656630110.

The previous prime is 201656630029. The next prime is 201656630171. The reversal of 201656630111 is 111036656102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201656630111 - 2¹⁰ = 201656629087 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201656630171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100828315055 + 100828315056.

It is an arithmetic number, because the mean of its divisors is an integer number (100828315056).

Almost surely, 2^201656630111 is an apocalyptic number.

201656630111 is a deficient number, since it is larger than the sum of its proper divisors (1).

201656630111 is an equidigital number, since it uses as much as digits as its factorization.

201656630111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 201656630111 in words is "two hundred one billion, six hundred fifty-six million, six hundred thirty thousand, one hundred eleven".