122143144219991 has 8 divisors (see below), whose sum is σ = 124947440209920. Its totient is φ = 119347410967128.

The previous prime is 122143144219937. The next prime is 122143144220033. The reversal of 122143144219991 is 199912441341221.

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

It is a cyclic number.

It is not a de Polignac number, because 122143144219991 - 2¹⁰ = 122143144218967 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 (122143144213991) 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, 2140655411 + ... + 2140712468.

It is an arithmetic number, because the mean of its divisors is an integer number (15618430026240).

Almost surely, 2^{122143144219991} is an apocalyptic number.

122143144219991 is a deficient number, since it is larger than the sum of its proper divisors (2804295989929).

122143144219991 is an equidigital number, since it uses as much as digits as its factorization.

122143144219991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4281368533.

The product of its digits is 1119744, while the sum is 53.

The spelling of 122143144219991 in words is "one hundred twenty-two trillion, one hundred forty-three billion, one hundred forty-four million, two hundred nineteen thousand, nine hundred ninety-one".