1210421143 has 4 divisors (see below), whose sum is σ = 1210491720. Its totient is φ = 1210350568.

The previous prime is 1210421119. The next prime is 1210421171. The reversal of 1210421143 is 3411240121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3411240121 = 149 ⋅22894229.

It is a cyclic number.

It is not a de Polignac number, because 1210421143 - 2¹⁷ = 1210290071 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 1210421143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210421843) 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, 8793 + ... + 49981.

It is an arithmetic number, because the mean of its divisors is an integer number (302622930).

Almost surely, 2^1210421143 is an apocalyptic number.

1210421143 is a deficient number, since it is larger than the sum of its proper divisors (70577).

1210421143 is an equidigital number, since it uses as much as digits as its factorization.

1210421143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70576.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1210421143 is about 34791.1072402130. The cubic root of 1210421143 is about 1065.7258507797.

Adding to 1210421143 its reverse (3411240121), we get a palindrome (4621661264).

The spelling of 1210421143 in words is "one billion, two hundred ten million, four hundred twenty-one thousand, one hundred forty-three".