21102201001 has 8 divisors (see below), whose sum is σ = 24306698240. Its totient is φ = 17945178048.

The previous prime is 21102200971. The next prime is 21102201007. The reversal of 21102201001 is 10010220112.

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

It is not a de Polignac number, because 21102201001 - 2¹⁵ = 21102168233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102201007) 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, 11867616 + ... + 11869393.

It is an arithmetic number, because the mean of its divisors is an integer number (3038337280).

Almost surely, 2^21102201001 is an apocalyptic number.

It is an amenable number.

21102201001 is a deficient number, since it is larger than the sum of its proper divisors (3204497239).

21102201001 is a wasteful number, since it uses less digits than its factorization.

21102201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23737143.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21102201001 its reverse (10010220112), we get a palindrome (31112421113).

The spelling of 21102201001 in words is "twenty-one billion, one hundred two million, two hundred one thousand, one".