101895421 has 2 divisors, whose sum is σ = 101895422. Its totient is φ = 101895420.

The previous prime is 101895407. The next prime is 101895427. The reversal of 101895421 is 124598101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91584900 + 10310521 = 9570^2 + 3211^2 .

It is a cyclic number.

It is not a de Polignac number, because 101895421 - 2⁷ = 101895293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101895427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50947710 + 50947711.

It is an arithmetic number, because the mean of its divisors is an integer number (50947711).

Almost surely, 2^101895421 is an apocalyptic number.

It is an amenable number.

101895421 is a deficient number, since it is larger than the sum of its proper divisors (1).

101895421 is an equidigital number, since it uses as much as digits as its factorization.

101895421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 101895421 is about 10094.3261786015. The cubic root of 101895421 is about 467.0731360528.

The spelling of 101895421 in words is "one hundred one million, eight hundred ninety-five thousand, four hundred twenty-one".