222121221131 has 8 divisors (see below), whose sum is σ = 231868114080. Its totient is φ = 212381782272.

The previous prime is 222121221097. The next prime is 222121221181. The reversal of 222121221131 is 131122121222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222121221131 - 2¹⁸ = 222120958987 is a prime.

It is a super-2 number, since 2×222121221131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121221181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1802576 + ... + 1921853.

It is an arithmetic number, because the mean of its divisors is an integer number (28983514260).

Almost surely, 2^222121221131 is an apocalyptic number.

222121221131 is a deficient number, since it is larger than the sum of its proper divisors (9746892949).

222121221131 is a wasteful number, since it uses less digits than its factorization.

222121221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727045.

The product of its digits is 192, while the sum is 20.

Adding to 222121221131 its reverse (131122121222), we get a palindrome (353243342353).

Subtracting from 222121221131 its reverse (131122121222), we obtain a palindrome (90999099909).

The spelling of 222121221131 in words is "two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred thirty-one".