21485101 has 8 divisors (see below), whose sum is σ = 23472864. Its totient is φ = 19503120.

The previous prime is 21485089. The next prime is 21485111. The reversal of 21485101 is 10158412.

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

It is a cyclic number.

It is not a de Polignac number, because 21485101 - 2⁵ = 21485069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21485111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11130 + ... + 12916.

It is an arithmetic number, because the mean of its divisors is an integer number (2934108).

Almost surely, 2^21485101 is an apocalyptic number.

It is an amenable number.

21485101 is a deficient number, since it is larger than the sum of its proper divisors (1987763).

21485101 is a wasteful number, since it uses less digits than its factorization.

21485101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 21485101 is about 4635.2023688292. The cubic root of 21485101 is about 278.0006426499. Note that the first 3 decimals are identical.

The spelling of 21485101 in words is "twenty-one million, four hundred eighty-five thousand, one hundred one".