1321210143 has 32 divisors (see below), whose sum is σ = 2144805120. Its totient is φ = 797165280.

The previous prime is 1321210123. The next prime is 1321210157. The reversal of 1321210143 is 3410121231.

It is not a de Polignac number, because 1321210143 - 2⁸ = 1321209887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321210123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57621 + ... + 77217.

It is an arithmetic number, because the mean of its divisors is an integer number (67025160).

Almost surely, 2^1321210143 is an apocalyptic number.

1321210143 is a deficient number, since it is larger than the sum of its proper divisors (823594977).

1321210143 is a wasteful number, since it uses less digits than its factorization.

1321210143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19844 (or 19838 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1321210143 is about 36348.4544788358. The cubic root of 1321210143 is about 1097.2964303327.

Adding to 1321210143 its reverse (3410121231), we get a palindrome (4731331374).

The spelling of 1321210143 in words is "one billion, three hundred twenty-one million, two hundred ten thousand, one hundred forty-three".