121010123 has 4 divisors (see below), whose sum is σ = 130318608. Its totient is φ = 111701640.

The previous prime is 121010117. The next prime is 121010137. The reversal of 121010123 is 321010121.

121010123 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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 121010123 - 2¹⁰ = 121009099 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121010173) 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, 4654223 + ... + 4654248.

It is an arithmetic number, because the mean of its divisors is an integer number (32579652).

Almost surely, 2^121010123 is an apocalyptic number.

121010123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121010123 is a deficient number, since it is larger than the sum of its proper divisors (9308485).

121010123 is an equidigital number, since it uses as much as digits as its factorization.

121010123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9308484.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 121010123 is about 11000.4601267402. The cubic root of 121010123 is about 494.6225371202.

Adding to 121010123 its reverse (321010121), we get a palindrome (442020244).

The spelling of 121010123 in words is "one hundred twenty-one million, ten thousand, one hundred twenty-three".