1000222222121 has 8 divisors (see below), whose sum is σ = 1017245918400. Its totient is φ = 983200885200.

The previous prime is 1000222222091. The next prime is 1000222222141. The reversal of 1000222222121 is 1212222220001.

It is a happy number.

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 1000222222121 - 2¹⁴ = 1000222205737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1000222222121.

It is not an unprimeable number, because it can be changed into a prime (1000222222141) 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, 275975 + ... + 1441043.

It is an arithmetic number, because the mean of its divisors is an integer number (127155739800).

Almost surely, 2^{1000222222121} is an apocalyptic number.

It is an amenable number.

1000222222121 is a deficient number, since it is larger than the sum of its proper divisors (17023696279).

1000222222121 is a wasteful number, since it uses less digits than its factorization.

1000222222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179679.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1000222222121 its reverse (1212222220001), we get a palindrome (2212444442122).

The spelling of 1000222222121 in words is "one trillion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".