1242133331 has 8 divisors (see below), whose sum is σ = 1301854464. Its totient is φ = 1182888520.

The previous prime is 1242133309. The next prime is 1242133351. The reversal of 1242133331 is 1333312421.

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 1242133331 - 2¹⁴ = 1242116947 is a prime.

It is a super-2 number, since 2×1242133331² = 3085790423962311122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 1242133297 and 1242133306.

It is not an unprimeable number, because it can be changed into a prime (1242133351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113735 + ... + 124176.

It is an arithmetic number, because the mean of its divisors is an integer number (162731808).

Almost surely, 2^1242133331 is an apocalyptic number.

1242133331 is a deficient number, since it is larger than the sum of its proper divisors (59721133).

1242133331 is a wasteful number, since it uses less digits than its factorization.

1242133331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238161.

The product of its digits is 1296, while the sum is 23.

The square root of 1242133331 is about 35243.9119707220. The cubic root of 1242133331 is about 1074.9528246109.

Adding to 1242133331 its reverse (1333312421), we get a palindrome (2575445752).

The spelling of 1242133331 in words is "one billion, two hundred forty-two million, one hundred thirty-three thousand, three hundred thirty-one".