222122021121 has 128 divisors (see below), whose sum is σ = 449319628800. Its totient is φ = 104706017280.

The previous prime is 222122021119. The next prime is 222122021137. The reversal of 222122021121 is 121120221222.

It is a happy number.

It is not a de Polignac number, because 222122021121 - 2¹ = 222122021119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222122021094 and 222122021103.

It is not an unprimeable number, because it can be changed into a prime (222122021101) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1524945 + ... + 1664241.

It is an arithmetic number, because the mean of its divisors is an integer number (3510309600).

Almost surely, 2^222122021121 is an apocalyptic number.

222122021121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222122021121 is an abundant number, since it is smaller than the sum of its proper divisors (227197607679).

222122021121 is a wasteful number, since it uses less digits than its factorization.

222122021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139396 (or 139390 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222122021121 its reverse (121120221222), we get a palindrome (343242242343).

The spelling of 222122021121 in words is "two hundred twenty-two billion, one hundred twenty-two million, twenty-one thousand, one hundred twenty-one".