21295101 has 16 divisors (see below), whose sum is σ = 30492288. Its totient is φ = 13171200.

The previous prime is 21295073. The next prime is 21295111. The reversal of 21295101 is 10159212.

It is not a de Polignac number, because 21295101 - 2⁶ = 21295037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21295111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681 + ... + 6561.

It is an arithmetic number, because the mean of its divisors is an integer number (1905768).

Almost surely, 2^21295101 is an apocalyptic number.

It is an amenable number.

21295101 is a deficient number, since it is larger than the sum of its proper divisors (9197187).

21295101 is a wasteful number, since it uses less digits than its factorization.

21295101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5972.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 21295101 is about 4614.6615260493. The cubic root of 21295101 is about 277.1787305466.

The spelling of 21295101 in words is "twenty-one million, two hundred ninety-five thousand, one hundred one".