21000001202210 has 32 divisors (see below), whose sum is σ = 39196333047600. Its totient is φ = 8091080766720.

The previous prime is 21000001202197. The next prime is 21000001202221. The reversal of 21000001202210 is 1220210000012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2029978101529 + 18970023100681 = 1424773^2 + 4355459^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21000001202191 and 21000001202200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85880045 + ... + 86124224.

Almost surely, 2^{21000001202210} is an apocalyptic number.

21000001202210 is a deficient number, since it is larger than the sum of its proper divisors (18196331845390).

21000001202210 is a wasteful number, since it uses less digits than its factorization.

21000001202210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172004726.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21000001202210 its reverse (1220210000012), we get a palindrome (22220211202222).

The spelling of 21000001202210 in words is "twenty-one trillion, one million, two hundred two thousand, two hundred ten".