100121100123 has 16 divisors (see below), whose sum is σ = 149566657536. Its totient is φ = 59039468640.

The previous prime is 100121100119. The next prime is 100121100137. The reversal of 100121100123 is 321001121001.

It is not a de Polignac number, because 100121100123 - 2² = 100121100119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100121100099 and 100121100108.

It is not an unprimeable number, because it can be changed into a prime (100121100623) 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, 40998411 + ... + 41000852.

It is an arithmetic number, because the mean of its divisors is an integer number (9347916096).

Almost surely, 2^100121100123 is an apocalyptic number.

100121100123 is a deficient number, since it is larger than the sum of its proper divisors (49445557413).

100121100123 is a wasteful number, since it uses less digits than its factorization.

100121100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81999314.

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

Adding to 100121100123 its reverse (321001121001), we get a palindrome (421122221124).

The spelling of 100121100123 in words is "one hundred billion, one hundred twenty-one million, one hundred thousand, one hundred twenty-three".