101558221097 has 2 divisors, whose sum is σ = 101558221098. Its totient is φ = 101558221096.

The previous prime is 101558221069. The next prime is 101558221111. The reversal of 101558221097 is 790122855101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93555845161 + 8002375936 = 305869^2 + 89456^2 .

It is a cyclic number.

It is not a de Polignac number, because 101558221097 - 2¹⁰ = 101558220073 is a prime.

It is not a weakly prime, because it can be changed into another prime (101558221397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50779110548 + 50779110549.

It is an arithmetic number, because the mean of its divisors is an integer number (50779110549).

Almost surely, 2^101558221097 is an apocalyptic number.

It is an amenable number.

101558221097 is a deficient number, since it is larger than the sum of its proper divisors (1).

101558221097 is an equidigital number, since it uses as much as digits as its factorization.

101558221097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 41.

The spelling of 101558221097 in words is "one hundred one billion, five hundred fifty-eight million, two hundred twenty-one thousand, ninety-seven".