100001211122121 has 8 divisors (see below), whose sum is σ = 136938595410624. Its totient is φ = 64865650457520.

The previous prime is 100001211122117. The next prime is 100001211122173. The reversal of 100001211122121 is 121221112100001.

It is a happy number.

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

It is not a de Polignac number, because 100001211122121 - 2² = 100001211122117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100001211122121.

It is not an unprimeable number, because it can be changed into a prime (100001211122621) 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 7 ways as a sum of consecutive naturals, for example, 450455905845 + ... + 450455906066.

It is an arithmetic number, because the mean of its divisors is an integer number (17117324426328).

Almost surely, 2^{100001211122121} is an apocalyptic number.

It is an amenable number.

100001211122121 is a deficient number, since it is larger than the sum of its proper divisors (36937384288503).

100001211122121 is an equidigital number, since it uses as much as digits as its factorization.

100001211122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900911811951.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 100001211122121 its reverse (121221112100001), we get a palindrome (221222323222122).

The spelling of 100001211122121 in words is "one hundred trillion, one billion, two hundred eleven million, one hundred twenty-two thousand, one hundred twenty-one".