222021222121211 has 64 divisors (see below), whose sum is σ = 248292076032000. Its totient is φ = 197627710242816.

The previous prime is 222021222121169. The next prime is 222021222121219. The reversal of 222021222121211 is 112121222120222.

It is not a de Polignac number, because 222021222121211 - 2³⁰ = 222020148379387 is a prime.

It is a super-2 number, since 2×222021222121211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222021222121219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3712140875 + ... + 3712200683.

It is an arithmetic number, because the mean of its divisors is an integer number (3879563688000).

Almost surely, 2^{222021222121211} is an apocalyptic number.

222021222121211 is a deficient number, since it is larger than the sum of its proper divisors (26270853910789).

222021222121211 is a wasteful number, since it uses less digits than its factorization.

222021222121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61068.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222021222121211 its reverse (112121222120222), we get a palindrome (334142444241433).

The spelling of 222021222121211 in words is "two hundred twenty-two trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred eleven".