21011202201 has 8 divisors (see below), whose sum is σ = 30561748704. Its totient is φ = 12734061920.

The previous prime is 21011202161. The next prime is 21011202209. The reversal of 21011202201 is 10220211012.

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 21011202201 - 2⁹ = 21011201689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011202209) 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, 318351516 + ... + 318351581.

It is an arithmetic number, because the mean of its divisors is an integer number (3820218588).

Almost surely, 2^21011202201 is an apocalyptic number.

It is an amenable number.

21011202201 is a deficient number, since it is larger than the sum of its proper divisors (9550546503).

21011202201 is a wasteful number, since it uses less digits than its factorization.

21011202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636703111.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21011202201 its reverse (10220211012), we get a palindrome (31231413213).

It can be divided in two parts, 21011202 and 201, that added together give a triangular number (21011403 = T₆₄₈₂).

The spelling of 21011202201 in words is "twenty-one billion, eleven million, two hundred two thousand, two hundred one".