1001002222121 has 8 divisors (see below), whose sum is σ = 1092951180288. Its totient is φ = 909211390000.

The previous prime is 1001002222109. The next prime is 1001002222141. The reversal of 1001002222121 is 1212222001001.

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 1001002222121 - 2⁶ = 1001002222057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001002222096 and 1001002222105.

It is not an unprimeable number, because it can be changed into a prime (1001002222141) 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, 39518270 + ... + 39543591.

It is an arithmetic number, because the mean of its divisors is an integer number (136618897536).

Almost surely, 2^{1001002222121} is an apocalyptic number.

1001002222121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001002222121 is a deficient number, since it is larger than the sum of its proper divisors (91948958167).

1001002222121 is a wasteful number, since it uses less digits than its factorization.

1001002222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79063023.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1001002222121 its reverse (1212222001001), we get a palindrome (2213224223122).

The spelling of 1001002222121 in words is "one trillion, one billion, two million, two hundred twenty-two thousand, one hundred twenty-one".