100001121020123 has 4 divisors (see below), whose sum is σ = 100131161490360. Its totient is φ = 99871080549888.

The previous prime is 100001121020113. The next prime is 100001121020179. The reversal of 100001121020123 is 321020121100001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100001121020123 - 2¹⁴ = 100001121003739 is a prime.

It is a super-2 number, since 2×100001121020123² (a number of 29 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 = 100001121020098 and 100001121020107.

It is not an unprimeable number, because it can be changed into a prime (100001121020113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65020233965 + ... + 65020235502.

It is an arithmetic number, because the mean of its divisors is an integer number (25032790372590).

Almost surely, 2^{100001121020123} is an apocalyptic number.

100001121020123 is a deficient number, since it is larger than the sum of its proper divisors (130040470237).

100001121020123 is an equidigital number, since it uses as much as digits as its factorization.

100001121020123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130040470236.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 100001121020123 its reverse (321020121100001), we get a palindrome (421021242120124).

The spelling of 100001121020123 in words is "one hundred trillion, one billion, one hundred twenty-one million, twenty thousand, one hundred twenty-three".