121404221334143 has 12 divisors (see below), whose sum is σ = 133445003513640. Its totient is φ = 110366899861680.

The previous prime is 121404221334073. The next prime is 121404221334223. The reversal of 121404221334143 is 341433122404121.

It is not a de Polignac number, because 121404221334143 - 2¹⁸ = 121404221071999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121404221330143) 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, 21679496 + ... + 26698482.

It is an arithmetic number, because the mean of its divisors is an integer number (11120416959470).

Almost surely, 2^{121404221334143} is an apocalyptic number.

121404221334143 is a deficient number, since it is larger than the sum of its proper divisors (12040782179497).

121404221334143 is a wasteful number, since it uses less digits than its factorization.

121404221334143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5218918 (or 5218907 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 121404221334143 its reverse (341433122404121), we get a palindrome (462837343738264).

The spelling of 121404221334143 in words is "one hundred twenty-one trillion, four hundred four billion, two hundred twenty-one million, three hundred thirty-four thousand, one hundred forty-three".