21002021201201 has 16 divisors (see below), whose sum is σ = 21548848358400. Its totient is φ = 20462724931968.

The previous prime is 21002021201173. The next prime is 21002021201207. The reversal of 21002021201201 is 10210212020012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002021201201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002021201207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1628336 + ... + 6682478.

It is an arithmetic number, because the mean of its divisors is an integer number (1346803022400).

Almost surely, 2^{21002021201201} is an apocalyptic number.

It is an amenable number.

21002021201201 is a deficient number, since it is larger than the sum of its proper divisors (546827157199).

21002021201201 is a wasteful number, since it uses less digits than its factorization.

21002021201201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5054888.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21002021201201 its reverse (10210212020012), we get a palindrome (31212233221213).

The spelling of 21002021201201 in words is "twenty-one trillion, two billion, twenty-one million, two hundred one thousand, two hundred one".