21002110201001 has 8 divisors (see below), whose sum is σ = 21347156623104. Its totient is φ = 20657087957520.

The previous prime is 21002110200961. The next prime is 21002110201069. The reversal of 21002110201001 is 10010201120012.

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 21002110201001 - 2⁶ = 21002110200937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21002110201901) 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, 4288985 + ... + 7771718.

It is an arithmetic number, because the mean of its divisors is an integer number (2668394577888).

Almost surely, 2^{21002110201001} is an apocalyptic number.

It is an amenable number.

21002110201001 is a deficient number, since it is larger than the sum of its proper divisors (345046422103).

21002110201001 is a wasteful number, since it uses less digits than its factorization.

21002110201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12089311.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21002110201001 its reverse (10010201120012), we get a palindrome (31012311321013).

The spelling of 21002110201001 in words is "twenty-one trillion, two billion, one hundred ten million, two hundred one thousand, one".