100121213203123 has 16 divisors (see below), whose sum is σ = 114455068955136. Its totient is φ = 85795065264960.

The previous prime is 100121213203111. The next prime is 100121213203157. The reversal of 100121213203123 is 321302312121001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100121213203123 is a prime.

It is a super-2 number, since 2×100121213203123² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100121213203094 and 100121213203103.

It is not an unprimeable number, because it can be changed into a prime (100121213201123) 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, 1318856215 + ... + 1318932127.

It is an arithmetic number, because the mean of its divisors is an integer number (7153441809696).

Almost surely, 2^{100121213203123} is an apocalyptic number.

100121213203123 is a deficient number, since it is larger than the sum of its proper divisors (14333855752013).

100121213203123 is an equidigital number, since it uses as much as digits as its factorization.

100121213203123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124194.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 100121213203123 its reverse (321302312121001), we get a palindrome (421423525324124).

The spelling of 100121213203123 in words is "one hundred trillion, one hundred twenty-one billion, two hundred thirteen million, two hundred three thousand, one hundred twenty-three".