202221121212111 has 16 divisors (see below), whose sum is σ = 273671548262528. Its totient is φ = 132792668157600.

The previous prime is 202221121212107. The next prime is 202221121212133. The reversal of 202221121212111 is 111212121122202.

It is not a de Polignac number, because 202221121212111 - 2² = 202221121212107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221121214111) 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, 32194345 + ... + 37959426.

It is an arithmetic number, because the mean of its divisors is an integer number (17104471766408).

Almost surely, 2^{202221121212111} is an apocalyptic number.

202221121212111 is a deficient number, since it is larger than the sum of its proper divisors (71450427050417).

202221121212111 is a wasteful number, since it uses less digits than its factorization.

202221121212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70168182.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 202221121212111 its reverse (111212121122202), we get a palindrome (313433242334313).

The spelling of 202221121212111 in words is "two hundred two trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred eleven".