21401112085 has 8 divisors (see below), whose sum is σ = 25683106176. Its totient is φ = 17119708560.

The previous prime is 21401112053. The next prime is 21401112101. The reversal of 21401112085 is 58021110412.

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

It is not a de Polignac number, because 21401112085 - 2⁵ = 21401112053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63561 + ... + 216430.

It is an arithmetic number, because the mean of its divisors is an integer number (3210388272).

Almost surely, 2^21401112085 is an apocalyptic number.

It is an amenable number.

21401112085 is a deficient number, since it is larger than the sum of its proper divisors (4281994091).

21401112085 is a wasteful number, since it uses less digits than its factorization.

21401112085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295283.

The product of its (nonzero) digits is 640, while the sum is 25.

Adding to 21401112085 its reverse (58021110412), we get a palindrome (79422222497).

The spelling of 21401112085 in words is "twenty-one billion, four hundred one million, one hundred twelve thousand, eighty-five".