1220142431 has 4 divisors (see below), whose sum is σ = 1226274000. Its totient is φ = 1214010864.

The previous prime is 1220142409. The next prime is 1220142449. The reversal of 1220142431 is 1342410221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220142431 - 2³⁰ = 146400607 is a prime.

It is a super-2 number, since 2×1220142431² = 2977495103853179522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220142401) 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, 3065486 + ... + 3065883.

It is an arithmetic number, because the mean of its divisors is an integer number (306568500).

Almost surely, 2^1220142431 is an apocalyptic number.

1220142431 is a deficient number, since it is larger than the sum of its proper divisors (6131569).

1220142431 is an equidigital number, since it uses as much as digits as its factorization.

1220142431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6131568.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1220142431 is about 34930.5372274748. The cubic root of 1220142431 is about 1068.5713109783.

Adding to 1220142431 its reverse (1342410221), we get a palindrome (2562552652).

The spelling of 1220142431 in words is "one billion, two hundred twenty million, one hundred forty-two thousand, four hundred thirty-one".