10001211123 has 8 divisors (see below), whose sum is σ = 13339810000. Its totient is φ = 6665043168.

The previous prime is 10001211097. The next prime is 10001211131. The reversal of 10001211123 is 32111210001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10001211123 - 2⁵ = 10001211091 is a prime.

It is a super-2 number, since 2×10001211123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001211099 and 10001211108.

It is not an unprimeable number, because it can be changed into a prime (10001211133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598108 + ... + 614601.

It is an arithmetic number, because the mean of its divisors is an integer number (1667476250).

Almost surely, 2^10001211123 is an apocalyptic number.

10001211123 is a deficient number, since it is larger than the sum of its proper divisors (3338598877).

10001211123 is a wasteful number, since it uses less digits than its factorization.

10001211123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215461.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 10001211123 its reverse (32111210001), we get a palindrome (42112421124).

The spelling of 10001211123 in words is "ten billion, one million, two hundred eleven thousand, one hundred twenty-three".