1142221331 has 8 divisors (see below), whose sum is σ = 1192503840. Its totient is φ = 1091990592.

The previous prime is 1142221303. The next prime is 1142221373. The reversal of 1142221331 is 1331222411.

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 1142221331 - 2¹⁰ = 1142220307 is a prime.

It is a super-2 number, since 2×1142221331² = 2609339137982823122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142221831) 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, 36161 + ... + 59933.

It is an arithmetic number, because the mean of its divisors is an integer number (149062980).

Almost surely, 2^1142221331 is an apocalyptic number.

1142221331 is a deficient number, since it is larger than the sum of its proper divisors (50282509).

1142221331 is a wasteful number, since it uses less digits than its factorization.

1142221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25885.

The product of its digits is 288, while the sum is 20.

The square root of 1142221331 is about 33796.7650966775. The cubic root of 1142221331 is about 1045.3219953532.

Adding to 1142221331 its reverse (1331222411), we get a palindrome (2473443742).

The spelling of 1142221331 in words is "one billion, one hundred forty-two million, two hundred twenty-one thousand, three hundred thirty-one".