1220121142 has 8 divisors (see below), whose sum is σ = 1831998600. Its totient is φ = 609454944.

The previous prime is 1220121137. The next prime is 1220121151. The reversal of 1220121142 is 2411210221.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300292 + ... + 304327.

It is an arithmetic number, because the mean of its divisors is an integer number (228999825).

Almost surely, 2^1220121142 is an apocalyptic number.

1220121142 is a deficient number, since it is larger than the sum of its proper divisors (611877458).

1220121142 is a wasteful number, since it uses less digits than its factorization.

1220121142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605630.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1220121142 is about 34930.2324927848. The cubic root of 1220121142 is about 1068.5650961446.

Adding to 1220121142 its reverse (2411210221), we get a palindrome (3631331363).

The spelling of 1220121142 in words is "one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred forty-two".