222122102122021 has 4 divisors (see below), whose sum is σ = 222132524050252. Its totient is φ = 222111680193792.

The previous prime is 222122102122007. The next prime is 222122102122033. The reversal of 222122102122021 is 120221201221222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 111985179113025 + 110136923008996 = 10582305^2 + 10494614^2 .

It is a cyclic number.

It is not a de Polignac number, because 222122102122021 - 2⁵ = 222122102121989 is a prime.

It is a super-2 number, since 2×222122102122021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222122102121983 and 222122102122001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222122102122091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5210932146 + ... + 5210974771.

It is an arithmetic number, because the mean of its divisors is an integer number (55533131012563).

Almost surely, 2^{222122102122021} is an apocalyptic number.

It is an amenable number.

222122102122021 is a deficient number, since it is larger than the sum of its proper divisors (10421928231).

222122102122021 is a wasteful number, since it uses less digits than its factorization.

222122102122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10421928230.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222122102122021 its reverse (120221201221222), we get a palindrome (342343303343243).

The spelling of 222122102122021 in words is "two hundred twenty-two trillion, one hundred twenty-two billion, one hundred two million, one hundred twenty-two thousand, twenty-one".