1220142351 has 4 divisors (see below), whose sum is σ = 1626856472. Its totient is φ = 813428232.

The previous prime is 1220142337. The next prime is 1220142353. The reversal of 1220142351 is 1532410221.

1220142351 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1220142351 - 2¹⁴ = 1220125967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220142353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203357056 + ... + 203357061.

It is an arithmetic number, because the mean of its divisors is an integer number (406714118).

Almost surely, 2^1220142351 is an apocalyptic number.

1220142351 is a deficient number, since it is larger than the sum of its proper divisors (406714121).

1220142351 is an equidigital number, since it uses as much as digits as its factorization.

1220142351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406714120.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1220142351 is about 34930.5360823449. The cubic root of 1220142351 is about 1068.5712876243.

Adding to 1220142351 its reverse (1532410221), we get a palindrome (2752552572).

The spelling of 1220142351 in words is "one billion, two hundred twenty million, one hundred forty-two thousand, three hundred fifty-one".