21102122001 has 8 divisors (see below), whose sum is σ = 28414738944. Its totient is φ = 13928793200.

The previous prime is 21102121967. The next prime is 21102122021. The reversal of 21102122001 is 10022120112.

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 21102122001 - 2¹⁷ = 21101990929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21102122021) 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, 34821681 + ... + 34822286.

It is an arithmetic number, because the mean of its divisors is an integer number (3551842368).

Almost surely, 2^21102122001 is an apocalyptic number.

It is an amenable number.

21102122001 is a deficient number, since it is larger than the sum of its proper divisors (7312616943).

21102122001 is a wasteful number, since it uses less digits than its factorization.

21102122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69644071.

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

Adding to 21102122001 its reverse (10022120112), we get a palindrome (31124242113).

The spelling of 21102122001 in words is "twenty-one billion, one hundred two million, one hundred twenty-two thousand, one".