101251091 has 2 divisors, whose sum is σ = 101251092. Its totient is φ = 101251090.

The previous prime is 101251069. The next prime is 101251097. The reversal of 101251091 is 190152101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101251091 - 2¹⁰ = 101250067 is a prime.

It is not a weakly prime, because it can be changed into another prime (101251097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50625545 + 50625546.

It is an arithmetic number, because the mean of its divisors is an integer number (50625546).

Almost surely, 2^101251091 is an apocalyptic number.

101251091 is a deficient number, since it is larger than the sum of its proper divisors (1).

101251091 is an equidigital number, since it uses as much as digits as its factorization.

101251091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 101251091 is about 10062.3601108289. The cubic root of 101251091 is about 466.0865499565.

The spelling of 101251091 in words is "one hundred one million, two hundred fifty-one thousand, ninety-one".