1142120020 has 24 divisors (see below), whose sum is σ = 2524687200. Its totient is φ = 432803232.

The previous prime is 1142120009. The next prime is 1142120051. The reversal of 1142120020 is 200212411.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1502410 + ... + 1503169.

It is an arithmetic number, because the mean of its divisors is an integer number (105195300).

Almost surely, 2^1142120020 is an apocalyptic number.

1142120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142120020 is an abundant number, since it is smaller than the sum of its proper divisors (1382567180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1142120020 is a wasteful number, since it uses less digits than its factorization.

1142120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3005607 (or 3005605 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1142120020 is about 33795.2662365604. The cubic root of 1142120020 is about 1045.2910889824.

Adding to 1142120020 its reverse (200212411), we get a palindrome (1342332431).

It can be divided in two parts, 11421 and 20020, that multiplied together give a triangular number (228648420 = T₂₁₃₈₄).

The spelling of 1142120020 in words is "one billion, one hundred forty-two million, one hundred twenty thousand, twenty".