121723143 has 12 divisors (see below), whose sum is σ = 167705784. Its totient is φ = 78529200.

The previous prime is 121723117. The next prime is 121723159. The reversal of 121723143 is 341327121.

It is a happy number.

It is not a de Polignac number, because 121723143 - 2¹⁴ = 121706759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121723103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18228 + ... + 23993.

It is an arithmetic number, because the mean of its divisors is an integer number (13975482).

Almost surely, 2^121723143 is an apocalyptic number.

121723143 is a deficient number, since it is larger than the sum of its proper divisors (45982641).

121723143 is an equidigital number, since it uses as much as digits as its factorization.

121723143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42286 (or 42255 counting only the distinct ones).

The product of its digits is 1008, while the sum is 24.

The square root of 121723143 is about 11032.8211713958. The cubic root of 121723143 is about 495.5921125809.

The spelling of 121723143 in words is "one hundred twenty-one million, seven hundred twenty-three thousand, one hundred forty-three".