20021100020210 has 16 divisors (see below), whose sum is σ = 36107150832792. Its totient is φ = 7993068720000.

The previous prime is 20021100020189. The next prime is 20021100020221. The reversal of 20021100020210 is 1202000112002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14736485248969 + 5284614771241 = 3838813^2 + 2298829^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20021100020191 and 20021100020200.

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 7 ways as a sum of consecutive naturals, for example, 1921405541 + ... + 1921415960.

Almost surely, 2^{20021100020210} is an apocalyptic number.

20021100020210 is a deficient number, since it is larger than the sum of its proper divisors (16086050812582).

20021100020210 is a wasteful number, since it uses less digits than its factorization.

20021100020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3842822029.

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

Adding to 20021100020210 its reverse (1202000112002), we get a palindrome (21223100132212).

The spelling of 20021100020210 in words is "twenty trillion, twenty-one billion, one hundred million, twenty thousand, two hundred ten".