21010531001 has 8 divisors (see below), whose sum is σ = 21765283200. Its totient is φ = 20257795600.

The previous prime is 21010530991. The next prime is 21010531007. The reversal of 21010531001 is 10013501012.

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 21010531001 - 2²² = 21006336697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010531007) 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, 482975 + ... + 524676.

It is an arithmetic number, because the mean of its divisors is an integer number (2720660400).

Almost surely, 2^21010531001 is an apocalyptic number.

It is an amenable number.

21010531001 is a deficient number, since it is larger than the sum of its proper divisors (754752199).

21010531001 is a wasteful number, since it uses less digits than its factorization.

21010531001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008399.

The product of its (nonzero) digits is 30, while the sum is 14.

The spelling of 21010531001 in words is "twenty-one billion, ten million, five hundred thirty-one thousand, one".