1201100143 has 4 divisors (see below), whose sum is σ = 1264315960. Its totient is φ = 1137884328.

The previous prime is 1201100137. The next prime is 1201100149. The reversal of 1201100143 is 3410011021.

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

It is an interprime number because it is at equal distance from previous prime (1201100137) and next prime (1201100149).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201100143 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 (1201100149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31607880 + ... + 31607917.

It is an arithmetic number, because the mean of its divisors is an integer number (316078990).

Almost surely, 2^1201100143 is an apocalyptic number.

1201100143 is a deficient number, since it is larger than the sum of its proper divisors (63215817).

1201100143 is an equidigital number, since it uses as much as digits as its factorization.

1201100143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63215816.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1201100143 is about 34656.8917100192. The cubic root of 1201100143 is about 1062.9832134337.

Adding to 1201100143 its reverse (3410011021), we get a palindrome (4611111164).

The spelling of 1201100143 in words is "one billion, two hundred one million, one hundred thousand, one hundred forty-three".