1000012222121 has 16 divisors (see below), whose sum is σ = 1094770010880. Its totient is φ = 905896408320.

The previous prime is 1000012222093. The next prime is 1000012222129. The reversal of 1000012222121 is 1212222100001.

It is a cyclic number.

It is not a de Polignac number, because 1000012222121 - 2⁶ = 1000012222057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000012222096 and 1000012222105.

It is not an unprimeable number, because it can be changed into a prime (1000012222129) 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 15 ways as a sum of consecutive naturals, for example, 56048720 + ... + 56066558.

It is an arithmetic number, because the mean of its divisors is an integer number (68423125680).

Almost surely, 2^{1000012222121} is an apocalyptic number.

1000012222121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1000012222121 is a deficient number, since it is larger than the sum of its proper divisors (94757788759).

1000012222121 is a wasteful number, since it uses less digits than its factorization.

1000012222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35536.

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

Adding to 1000012222121 its reverse (1212222100001), we get a palindrome (2212234322122).

The spelling of 1000012222121 in words is "one trillion, twelve million, two hundred twenty-two thousand, one hundred twenty-one".