1211442031 has 2 divisors, whose sum is σ = 1211442032. Its totient is φ = 1211442030.

The previous prime is 1211442007. The next prime is 1211442073. The reversal of 1211442031 is 1302441121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211442031 - 2⁵ = 1211441999 is a prime.

It is a super-3 number, since 3×1211442031³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212442031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605721015 + 605721016.

It is an arithmetic number, because the mean of its divisors is an integer number (605721016).

Almost surely, 2^1211442031 is an apocalyptic number.

1211442031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211442031 is an equidigital number, since it uses as much as digits as its factorization.

1211442031 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1211442031 is about 34805.7758281582. The cubic root of 1211442031 is about 1066.0253831662.

Adding to 1211442031 its reverse (1302441121), we get a palindrome (2513883152).

It can be divided in two parts, 12114 and 42031, that added together give a palindrome (54145).

The spelling of 1211442031 in words is "one billion, two hundred eleven million, four hundred forty-two thousand, thirty-one".