121331222143 has 8 divisors (see below), whose sum is σ = 127725736320. Its totient is φ = 114937574040.

The previous prime is 121331222137. The next prime is 121331222149. The reversal of 121331222143 is 341222133121.

It is an interprime number because it is at equal distance from previous prime (121331222137) and next prime (121331222149).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121331222143 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331222149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81588 + ... + 499318.

It is an arithmetic number, because the mean of its divisors is an integer number (15965717040).

Almost surely, 2^121331222143 is an apocalyptic number.

121331222143 is a deficient number, since it is larger than the sum of its proper divisors (6394514177).

121331222143 is a wasteful number, since it uses less digits than its factorization.

121331222143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433037.

The product of its digits is 1728, while the sum is 25.

Adding to 121331222143 its reverse (341222133121), we get a palindrome (462553355264).

The spelling of 121331222143 in words is "one hundred twenty-one billion, three hundred thirty-one million, two hundred twenty-two thousand, one hundred forty-three".