121012113331123 has 4 divisors (see below), whose sum is σ = 138299558092720. Its totient is φ = 103724668569528.

The previous prime is 121012113331111. The next prime is 121012113331141. The reversal of 121012113331123 is 321133311210121.

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 121012113331123 - 2⁵ = 121012113331091 is a prime.

It is a super-2 number, since 2×121012113331123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121012113331183) 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, 8643722380788 + ... + 8643722380801.

It is an arithmetic number, because the mean of its divisors is an integer number (34574889523180).

Almost surely, 2^{121012113331123} is an apocalyptic number.

121012113331123 is a deficient number, since it is larger than the sum of its proper divisors (17287444761597).

121012113331123 is an equidigital number, since it uses as much as digits as its factorization.

121012113331123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17287444761596.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 121012113331123 its reverse (321133311210121), we get a palindrome (442145424541244).

The spelling of 121012113331123 in words is "one hundred twenty-one trillion, twelve billion, one hundred thirteen million, three hundred thirty-one thousand, one hundred twenty-three".