1221142330 has 16 divisors (see below), whose sum is σ = 2200068864. Its totient is φ = 488009680.

The previous prime is 1221142327. The next prime is 1221142333. The reversal of 1221142330 is 332411221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1221142327) and next prime (1221142333).

It is a junction number, because it is equal to n+sod(n) for n = 1221142298 and 1221142307.

It is not an unprimeable number, because it can be changed into a prime (1221142333) 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, 44326 + ... + 66385.

It is an arithmetic number, because the mean of its divisors is an integer number (137504304).

Almost surely, 2^1221142330 is an apocalyptic number.

1221142330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221142330 is a deficient number, since it is larger than the sum of its proper divisors (978926534).

1221142330 is a wasteful number, since it uses less digits than its factorization.

1221142330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111821.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1221142330 is about 34944.8469734809. The cubic root of 1221142330 is about 1068.8631270878.

Adding to 1221142330 its reverse (332411221), we get a palindrome (1553553551).

The spelling of 1221142330 in words is "one billion, two hundred twenty-one million, one hundred forty-two thousand, three hundred thirty".