1242111031 has 8 divisors (see below), whose sum is σ = 1454179104. Its totient is φ = 1038698880.

The previous prime is 1242111023. The next prime is 1242111037. The reversal of 1242111031 is 1301112421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242111031 - 2³ = 1242111023 is a prime.

It is a super-2 number, since 2×1242111031² = 3085679626663765922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242110996 and 1242111014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242111037) 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 7 ways as a sum of consecutive naturals, for example, 2163670 + ... + 2164243.

It is an arithmetic number, because the mean of its divisors is an integer number (181772388).

Almost surely, 2^1242111031 is an apocalyptic number.

1242111031 is a deficient number, since it is larger than the sum of its proper divisors (212068073).

1242111031 is an equidigital number, since it uses as much as digits as its factorization.

1242111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4327961.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1242111031 is about 35243.5956026056. The cubic root of 1242111031 is about 1074.9463917020.

Adding to 1242111031 its reverse (1301112421), we get a palindrome (2543223452).

The spelling of 1242111031 in words is "one billion, two hundred forty-two million, one hundred eleven thousand, thirty-one".