100921147 has 2 divisors, whose sum is σ = 100921148. Its totient is φ = 100921146.

The previous prime is 100921099. The next prime is 100921181. The reversal of 100921147 is 741129001.

It is a strong prime.

It is an emirp because it is prime and its reverse (741129001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100921147 - 2⁷ = 100921019 is a prime.

It is a super-3 number, since 3×100921147³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (100921547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50460573 + 50460574.

It is an arithmetic number, because the mean of its divisors is an integer number (50460574).

Almost surely, 2^100921147 is an apocalyptic number.

100921147 is a deficient number, since it is larger than the sum of its proper divisors (1).

100921147 is an equidigital number, since it uses as much as digits as its factorization.

100921147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 100921147 is about 10045.9517717337. The cubic root of 100921147 is about 465.5797247812.

The spelling of 100921147 in words is "one hundred million, nine hundred twenty-one thousand, one hundred forty-seven".