121203343143 has 16 divisors (see below), whose sum is σ = 182948444640. Its totient is φ = 79277657472.

The previous prime is 121203343039. The next prime is 121203343159. The reversal of 121203343143 is 341343302121.

It is a happy number.

121203343143 is a `hidden beast` number, since 1 + 2 + 12 + 0 + 334 + 314 + 3 = 666.

It is not a de Polignac number, because 121203343143 - 2¹⁷ = 121203212071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121203343343) 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, 42347746 + ... + 42350607.

It is an arithmetic number, because the mean of its divisors is an integer number (11434277790).

Almost surely, 2^121203343143 is an apocalyptic number.

121203343143 is a deficient number, since it is larger than the sum of its proper divisors (61745101497).

121203343143 is an equidigital number, since it uses as much as digits as its factorization.

121203343143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84698415 (or 84698409 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 121203343143 its reverse (341343302121), we get a palindrome (462546645264).

The spelling of 121203343143 in words is "one hundred twenty-one billion, two hundred three million, three hundred forty-three thousand, one hundred forty-three".