1242312101 has 4 divisors (see below), whose sum is σ = 1242893952. Its totient is φ = 1241730252.

The previous prime is 1242312059. The next prime is 1242312109. The reversal of 1242312101 is 1012132421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1242312101 - 2¹⁸ = 1242049957 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 1242312101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242312109) 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 3 ways as a sum of consecutive naturals, for example, 287711 + ... + 291996.

It is an arithmetic number, because the mean of its divisors is an integer number (310723488).

Almost surely, 2^1242312101 is an apocalyptic number.

It is an amenable number.

1242312101 is a deficient number, since it is larger than the sum of its proper divisors (581851).

1242312101 is an equidigital number, since it uses as much as digits as its factorization.

1242312101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581850.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1242312101 is about 35246.4480621807. The cubic root of 1242312101 is about 1075.0043918335.

Adding to 1242312101 its reverse (1012132421), we get a palindrome (2254444522).

The spelling of 1242312101 in words is "one billion, two hundred forty-two million, three hundred twelve thousand, one hundred one".