1242122331 has 8 divisors (see below), whose sum is σ = 1664745040. Its totient is φ = 823790592.

The previous prime is 1242122317. The next prime is 1242122333. The reversal of 1242122331 is 1332212421.

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

It is not a de Polignac number, because 1242122331 - 2¹⁸ = 1241860187 is a prime.

It is a super-2 number, since 2×1242122331² = 3085735770337747122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242122298 and 1242122307.

It is not an unprimeable number, because it can be changed into a prime (1242122333) 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, 1072066 + ... + 1073223.

It is an arithmetic number, because the mean of its divisors is an integer number (208093130).

Almost surely, 2^1242122331 is an apocalyptic number.

1242122331 is a deficient number, since it is larger than the sum of its proper divisors (422622709).

1242122331 is a wasteful number, since it uses less digits than its factorization.

1242122331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145485.

The product of its digits is 576, while the sum is 21.

The square root of 1242122331 is about 35243.7559150554. The cubic root of 1242122331 is about 1074.9496514368.

Adding to 1242122331 its reverse (1332212421), we get a palindrome (2574334752).

The spelling of 1242122331 in words is "one billion, two hundred forty-two million, one hundred twenty-two thousand, three hundred thirty-one".