143857821011 has 4 divisors (see below), whose sum is σ = 143869834152. Its totient is φ = 143845807872.

The previous prime is 143857820989. The next prime is 143857821013. The reversal of 143857821011 is 110128758341.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143857821011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143857821011.

It is not an unprimeable number, because it can be changed into a prime (143857821013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5988590 + ... + 6012563.

It is an arithmetic number, because the mean of its divisors is an integer number (35967458538).

Almost surely, 2^143857821011 is an apocalyptic number.

143857821011 is a deficient number, since it is larger than the sum of its proper divisors (12013141).

143857821011 is a wasteful number, since it uses less digits than its factorization.

143857821011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12013140.

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 143857821011 in words is "one hundred forty-three billion, eight hundred fifty-seven million, eight hundred twenty-one thousand, eleven".