20212202021111 has 4 divisors (see below), whose sum is σ = 20642248872672. Its totient is φ = 19782155169552.

The previous prime is 20212202021021. The next prime is 20212202021177. The reversal of 20212202021111 is 11112020221202.

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 20212202021111 - 2²⁶ = 20212134912247 is a prime.

It is a super-2 number, since 2×20212202021111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212202021111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212202021311) 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, 215023425710 + ... + 215023425803.

It is an arithmetic number, because the mean of its divisors is an integer number (5160562218168).

Almost surely, 2^{20212202021111} is an apocalyptic number.

20212202021111 is a deficient number, since it is larger than the sum of its proper divisors (430046851561).

20212202021111 is an equidigital number, since it uses as much as digits as its factorization.

20212202021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430046851560.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20212202021111 its reverse (11112020221202), we get a palindrome (31324222242313).

The spelling of 20212202021111 in words is "twenty trillion, two hundred twelve billion, two hundred two million, twenty-one thousand, one hundred eleven".