20021100110212 has 6 divisors (see below), whose sum is σ = 35036925192878. Its totient is φ = 10010550055104.

The previous prime is 20021100110173. The next prime is 20021100110227. The reversal of 20021100110212 is 21201100112002.

It can be written as a sum of positive squares in only one way, i.e., 19975035790336 + 46064319876 = 4469344^2 + 214626^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20021100110192 and 20021100110201.

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 as a sum of consecutive naturals, namely, 2502637513773 + ... + 2502637513780.

Almost surely, 2^{20021100110212} is an apocalyptic number.

It is an amenable number.

20021100110212 is a deficient number, since it is larger than the sum of its proper divisors (15015825082666).

20021100110212 is a wasteful number, since it uses less digits than its factorization.

20021100110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005275027557 (or 5005275027555 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021100110212 its reverse (21201100112002), we get a palindrome (41222200222214).

The spelling of 20021100110212 in words is "twenty trillion, twenty-one billion, one hundred million, one hundred ten thousand, two hundred twelve".