222121011121 has 8 divisors (see below), whose sum is σ = 226342646784. Its totient is φ = 217931237280.

The previous prime is 222121011103. The next prime is 222121011137. The reversal of 222121011121 is 121110121222.

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 222121011121 - 2³³ = 213531076529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222121011095 and 222121011104.

It is not an unprimeable number, because it can be changed into a prime (222121011181) 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 7 ways as a sum of consecutive naturals, for example, 7951381 + ... + 7979266.

It is an arithmetic number, because the mean of its divisors is an integer number (28292830848).

Almost surely, 2^222121011121 is an apocalyptic number.

It is an amenable number.

222121011121 is a deficient number, since it is larger than the sum of its proper divisors (4221635663).

222121011121 is a wasteful number, since it uses less digits than its factorization.

222121011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15930911.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 222121011121 its reverse (121110121222), we get a palindrome (343231132343).

The spelling of 222121011121 in words is "two hundred twenty-two billion, one hundred twenty-one million, eleven thousand, one hundred twenty-one".