212020202111 has 4 divisors (see below), whose sum is σ = 221238471792. Its totient is φ = 202801932432.

The previous prime is 212020202101. The next prime is 212020202123. The reversal of 212020202111 is 111202020212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212020202111 - 2¹⁰ = 212020201087 is a prime.

It is a super-2 number, since 2×212020202111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020202101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4609134806 + ... + 4609134851.

It is an arithmetic number, because the mean of its divisors is an integer number (55309617948).

Almost surely, 2^212020202111 is an apocalyptic number.

212020202111 is a deficient number, since it is larger than the sum of its proper divisors (9218269681).

212020202111 is an equidigital number, since it uses as much as digits as its factorization.

212020202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9218269680.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212020202111 its reverse (111202020212), we get a palindrome (323222222323).

It can be divided in two parts, 21202020211 and 1, that added together give a palindrome (21202020212).

The spelling of 212020202111 in words is "two hundred twelve billion, twenty million, two hundred two thousand, one hundred eleven".