1210442231 has 4 divisors (see below), whose sum is σ = 1210515432. Its totient is φ = 1210369032.

The previous prime is 1210442209. The next prime is 1210442237. The reversal of 1210442231 is 1322440121.

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: 1322440121 = 389 ⋅3399589.

It is a cyclic number.

It is not a de Polignac number, because 1210442231 - 2¹⁸ = 1210180087 is a prime.

It is a super-2 number, since 2×1210442231² = 2930340789176514722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210442237) 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, 1256 + ... + 49218.

It is an arithmetic number, because the mean of its divisors is an integer number (302628858).

Almost surely, 2^1210442231 is an apocalyptic number.

1210442231 is a deficient number, since it is larger than the sum of its proper divisors (73201).

1210442231 is an equidigital number, since it uses as much as digits as its factorization.

1210442231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73200.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1210442231 is about 34791.4103048439. The cubic root of 1210442231 is about 1065.7320397816.

Adding to 1210442231 its reverse (1322440121), we get a palindrome (2532882352).

The spelling of 1210442231 in words is "one billion, two hundred ten million, four hundred forty-two thousand, two hundred thirty-one".