21010202000 has 40 divisors (see below), whose sum is σ = 50802673272. Its totient is φ = 8404080000.

The previous prime is 21010201999. The next prime is 21010202039. The reversal of 21010202000 is 20201012.

It can be written as a sum of positive squares in 4 ways, for example, as 968703376 + 20041498624 = 31124^2 + 141568^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (8).

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, 5250551 + ... + 5254550.

Almost surely, 2^21010202000 is an apocalyptic number.

21010202000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010202000 is an abundant number, since it is smaller than the sum of its proper divisors (29792471272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21010202000 is a wasteful number, since it uses less digits than its factorization.

21010202000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505124 (or 10505108 counting only the distinct ones).

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

Adding to 21010202000 its reverse (20201012), we get a palindrome (21030403012).

The spelling of 21010202000 in words is "twenty-one billion, ten million, two hundred two thousand".