10001123121111 has 16 divisors (see below), whose sum is σ = 13554214447968. Its totient is φ = 6557736182400.

The previous prime is 10001123121097. The next prime is 10001123121113. The reversal of 10001123121111 is 11112132110001.

It is not a de Polignac number, because 10001123121111 - 2⁷ = 10001123120983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001123121113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1634781 + ... + 4761801.

It is an arithmetic number, because the mean of its divisors is an integer number (847138402998).

Almost surely, 2^{10001123121111} is an apocalyptic number.

10001123121111 is a deficient number, since it is larger than the sum of its proper divisors (3553091326857).

10001123121111 is a wasteful number, since it uses less digits than its factorization.

10001123121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144562.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 10001123121111 its reverse (11112132110001), we get a palindrome (21113255231112).

The spelling of 10001123121111 in words is "ten trillion, one billion, one hundred twenty-three million, one hundred twenty-one thousand, one hundred eleven".