212120020011 has 16 divisors (see below), whose sum is σ = 284387973120. Its totient is φ = 140633126880.

The previous prime is 212120019919. The next prime is 212120020067. The reversal of 212120020011 is 110020021212.

It is not a de Polignac number, because 212120020011 - 2¹⁰ = 212120018987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212120070011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2046021 + ... + 2147193.

It is an arithmetic number, because the mean of its divisors is an integer number (17774248320).

Almost surely, 2^212120020011 is an apocalyptic number.

212120020011 is a deficient number, since it is larger than the sum of its proper divisors (72267953109).

212120020011 is a wasteful number, since it uses less digits than its factorization.

212120020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105026.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 212120020011 its reverse (110020021212), we get a palindrome (322140041223).

The spelling of 212120020011 in words is "two hundred twelve billion, one hundred twenty million, twenty thousand, eleven".