21002201201201 has 4 divisors (see below), whose sum is σ = 22911492219504. Its totient is φ = 19092910182900.

The previous prime is 21002201201197. The next prime is 21002201201221. The reversal of 21002201201201 is 10210210220012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21002201201201 - 2² = 21002201201197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002201201221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954645509135 + ... + 954645509156.

It is an arithmetic number, because the mean of its divisors is an integer number (5727873054876).

Almost surely, 2^{21002201201201} is an apocalyptic number.

It is an amenable number.

21002201201201 is a deficient number, since it is larger than the sum of its proper divisors (1909291018303).

21002201201201 is a wasteful number, since it uses less digits than its factorization.

21002201201201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909291018302.

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

Adding to 21002201201201 its reverse (10210210220012), we get a palindrome (31212411421213).

The spelling of 21002201201201 in words is "twenty-one trillion, two billion, two hundred one million, two hundred one thousand, two hundred one".