222121201011111 has 12 divisors (see below), whose sum is σ = 329513133031992. Its totient is φ = 144078616871856.

The previous prime is 222121201011097. The next prime is 222121201011133. The reversal of 222121201011111 is 111110102121222.

It is a happy number.

222121201011111 is a `hidden beast` number, since 222 + 121 + 201 + 0 + 11 + 111 = 666.

It is not a de Polignac number, because 222121201011111 - 2¹⁰ = 222121201010087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121201011161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333515316501 + ... + 333515317166.

It is an arithmetic number, because the mean of its divisors is an integer number (27459427752666).

Almost surely, 2^{222121201011111} is an apocalyptic number.

222121201011111 is a deficient number, since it is larger than the sum of its proper divisors (107391932020881).

222121201011111 is a wasteful number, since it uses less digits than its factorization.

222121201011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667030633710 (or 667030633707 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 222121201011111 its reverse (111110102121222), we get a palindrome (333231303132333).

The spelling of 222121201011111 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred one million, eleven thousand, one hundred eleven".