21101001000210 has 48 divisors (see below), whose sum is σ = 56345375652696. Its totient is φ = 5474854312704.

The previous prime is 21101001000197. The next prime is 21101001000229. The reversal of 21101001000210 is 1200010010112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17480669018121 + 3620331982089 = 4180989^2 + 1902717^2 .

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 = 21101001000192 and 21101001000201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3168315139 + ... + 3168321798.

Almost surely, 2^{21101001000210} is an apocalyptic number.

21101001000210 is an abundant number, since it is smaller than the sum of its proper divisors (35244374652486).

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

21101001000210 is a wasteful number, since it uses less digits than its factorization.

21101001000210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6336636987 (or 6336636984 counting only the distinct ones).

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

Adding to 21101001000210 its reverse (1200010010112), we get a palindrome (22301011010322).

The spelling of 21101001000210 in words is "twenty-one trillion, one hundred one billion, one million, two hundred ten", and thus it is an aban number.