21221012095 has 8 divisors (see below), whose sum is σ = 25482325680. Its totient is φ = 16965402240.

The previous prime is 21221012069. The next prime is 21221012119. The reversal of 21221012095 is 59021012212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21221012095 - 2⁵ = 21221012063 is a prime.

It is a super-2 number, since 2×21221012095² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1417741 + ... + 1432630.

It is an arithmetic number, because the mean of its divisors is an integer number (3185290710).

Almost surely, 2^21221012095 is an apocalyptic number.

21221012095 is a deficient number, since it is larger than the sum of its proper divisors (4261313585).

21221012095 is a wasteful number, since it uses less digits than its factorization.

21221012095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851865.

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 21221012095 in words is "twenty-one billion, two hundred twenty-one million, twelve thousand, ninety-five".