1001211122223 has 36 divisors (see below), whose sum is σ = 1595544122952. Its totient is φ = 604504779840.

The previous prime is 1001211122221. The next prime is 1001211122231. The reversal of 1001211122223 is 3222211121001.

It is not a de Polignac number, because 1001211122223 - 2¹ = 1001211122221 is a prime.

It is a super-5 number, since 5×1001211122223⁵ (a number of 61 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1001211122196 and 1001211122205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001211122221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6129373 + ... + 6290598.

It is an arithmetic number, because the mean of its divisors is an integer number (44320670082).

Almost surely, 2^{1001211122223} is an apocalyptic number.

1001211122223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1001211122223 is a deficient number, since it is larger than the sum of its proper divisors (594333000729).

1001211122223 is a wasteful number, since it uses less digits than its factorization.

1001211122223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12420056 (or 12420040 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1001211122223 its reverse (3222211121001), we get a palindrome (4223422243224).

The spelling of 1001211122223 in words is "one trillion, one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twenty-three".