21111002201 has 8 divisors (see below), whose sum is σ = 22938950400. Its totient is φ = 19354738320.

The previous prime is 21111002161. The next prime is 21111002207. The reversal of 21111002201 is 10220011112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21111002201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21111002207) 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, 17920466 + ... + 17921643.

It is an arithmetic number, because the mean of its divisors is an integer number (2867368800).

Almost surely, 2^21111002201 is an apocalyptic number.

It is an amenable number.

21111002201 is a deficient number, since it is larger than the sum of its proper divisors (1827948199).

21111002201 is a wasteful number, since it uses less digits than its factorization.

21111002201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35842159.

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

Adding to 21111002201 its reverse (10220011112), we get a palindrome (31331013313).

The spelling of 21111002201 in words is "twenty-one billion, one hundred eleven million, two thousand, two hundred one".