21001000202 has 16 divisors (see below), whose sum is σ = 38771077632. Its totient is φ = 8308087920.

The previous prime is 21001000199. The next prime is 21001000213. The reversal of 21001000202 is 20200010012.

It is a self number, because there is not a number n which added to its sum of digits gives 21001000202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57694874 + ... + 57695237.

It is an arithmetic number, because the mean of its divisors is an integer number (2423192352).

Almost surely, 2^21001000202 is an apocalyptic number.

21001000202 is a deficient number, since it is larger than the sum of its proper divisors (17770077430).

21001000202 is a wasteful number, since it uses less digits than its factorization.

21001000202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115390133.

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

Adding to 21001000202 its reverse (20200010012), we get a palindrome (41201010214).

The spelling of 21001000202 in words is "twenty-one billion, one million, two hundred two", and thus it is an aban number.