21000210110010 has 40 divisors (see below), whose sum is σ = 56467231631316. Its totient is φ = 5600056029120.

The previous prime is 21000210109981. The next prime is 21000210110027. The reversal of 21000210110010 is 1001101200012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19725882952689 + 1274327157321 = 4441383^2 + 1128861^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21000210109974 and 21000210110001.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12963091851 + ... + 12963093470.

Almost surely, 2^{21000210110010} is an apocalyptic number.

21000210110010 is an abundant number, since it is smaller than the sum of its proper divisors (35467021521306).

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

21000210110010 is a wasteful number, since it uses less digits than its factorization.

21000210110010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25926185340 (or 25926185331 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21000210110010 its reverse (1001101200012), we get a palindrome (22001311310022).

The spelling of 21000210110010 in words is "twenty-one trillion, two hundred ten million, one hundred ten thousand, ten".