21010001000001 has 8 divisors (see below), whose sum is σ = 30168206564160. Its totient is φ = 12929231384592.

The previous prime is 21010000999997. The next prime is 21010001000041. The reversal of 21010001000001 is 10000010001012.

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

It is not a de Polignac number, because 21010001000001 - 2² = 21010000999997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21010001000041) 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, 269358987141 + ... + 269358987218.

It is an arithmetic number, because the mean of its divisors is an integer number (3771025820520).

Almost surely, 2^{21010001000001} is an apocalyptic number.

It is an amenable number.

21010001000001 is a deficient number, since it is larger than the sum of its proper divisors (9158205564159).

21010001000001 is a wasteful number, since it uses less digits than its factorization.

21010001000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538717974375.

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 21010001000001 its reverse (10000010001012), we get a palindrome (31010011001013).

The spelling of 21010001000001 in words is "twenty-one trillion, ten billion, one million, one", and thus it is an aban number and an uban number.