21102200001 has 32 divisors (see below), whose sum is σ = 32950800000. Its totient is φ = 13326715584.

The previous prime is 21102199997. The next prime is 21102200017. The reversal of 21102200001 is 10000220112.

It is not a de Polignac number, because 21102200001 - 2² = 21102199997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (21102207001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212751 + ... + 295748.

It is an arithmetic number, because the mean of its divisors is an integer number (1029712500).

Almost surely, 2^21102200001 is an apocalyptic number.

It is an amenable number.

21102200001 is a deficient number, since it is larger than the sum of its proper divisors (11848599999).

21102200001 is a wasteful number, since it uses less digits than its factorization.

21102200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508590 (or 508584 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21102200001 its reverse (10000220112), we get a palindrome (31102420113).

The spelling of 21102200001 in words is "twenty-one billion, one hundred two million, two hundred thousand, one".