21011002210201 has 4 divisors (see below), whose sum is σ = 21012433199632. Its totient is φ = 21009571220772.

The previous prime is 21011002210193. The next prime is 21011002210207. The reversal of 21011002210201 is 10201220011012.

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 21011002210201 - 2³ = 21011002210193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011002210207) 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, 715472691 + ... + 715502056.

It is an arithmetic number, because the mean of its divisors is an integer number (5253108299908).

Almost surely, 2^{21011002210201} is an apocalyptic number.

It is an amenable number.

21011002210201 is a deficient number, since it is larger than the sum of its proper divisors (1430989431).

21011002210201 is a wasteful number, since it uses less digits than its factorization.

21011002210201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430989430.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21011002210201 its reverse (10201220011012), we get a palindrome (31212222221213).

The spelling of 21011002210201 in words is "twenty-one trillion, eleven billion, two million, two hundred ten thousand, two hundred one".