222121121220011 has 16 divisors (see below), whose sum is σ = 251797753616640. Its totient is φ = 194243161825440.

The previous prime is 222121121219951. The next prime is 222121121220017. The reversal of 222121121220011 is 110022121121222.

It is not a de Polignac number, because 222121121220011 - 2¹⁸ = 222121120957867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121121220017) 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, 228583706 + ... + 229553376.

It is an arithmetic number, because the mean of its divisors is an integer number (15737359601040).

Almost surely, 2^{222121121220011} is an apocalyptic number.

222121121220011 is a deficient number, since it is larger than the sum of its proper divisors (29676632396629).

222121121220011 is a wasteful number, since it uses less digits than its factorization.

222121121220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897106.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 222121121220011 its reverse (110022121121222), we get a palindrome (332143242341233).

The spelling of 222121121220011 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, eleven".