21010544001 has 24 divisors (see below), whose sum is σ = 32143681440. Its totient is φ = 13179021696.

The previous prime is 21010543949. The next prime is 21010544011. The reversal of 21010544001 is 10044501012.

21010544001 is a `hidden beast` number, since 210 + 1 + 0 + 54 + 400 + 1 = 666.

It is not a de Polignac number, because 21010544001 - 2⁶ = 21010543937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21010544011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 522066 + ... + 560868.

It is an arithmetic number, because the mean of its divisors is an integer number (1339320060).

Almost surely, 2^21010544001 is an apocalyptic number.

It is an amenable number.

21010544001 is a deficient number, since it is larger than the sum of its proper divisors (11133137439).

21010544001 is a wasteful number, since it uses less digits than its factorization.

21010544001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42365 (or 42362 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The spelling of 21010544001 in words is "twenty-one billion, ten million, five hundred forty-four thousand, one".