1122221222001 has 32 divisors (see below), whose sum is σ = 1813847318400. Its totient is φ = 680075403840.

The previous prime is 1122221221973. The next prime is 1122221222099. The reversal of 1122221222001 is 1002221222211.

It is a happy number.

1122221222001 is a `hidden beast` number, since 11 + 222 + 212 + 220 + 0 + 1 = 666.

It is not a de Polignac number, because 1122221222001 - 2⁹ = 1122221221489 is a prime.

It is a super-2 number, since 2×1122221222001² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1122221222201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3418035 + ... + 3731943.

It is an arithmetic number, because the mean of its divisors is an integer number (56682728700).

Almost surely, 2^{1122221222001} is an apocalyptic number.

1122221222001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1122221222001 is a deficient number, since it is larger than the sum of its proper divisors (691626096399).

1122221222001 is a wasteful number, since it uses less digits than its factorization.

1122221222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325966 (or 325960 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1122221222001 its reverse (1002221222211), we get a palindrome (2124442444212).

The spelling of 1122221222001 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-two thousand, one".