1021020143 has 48 divisors (see below), whose sum is σ = 1268513568. Its totient is φ = 815443200.

The previous prime is 1021020109. The next prime is 1021020149. The reversal of 1021020143 is 3410201201.

It is not a de Polignac number, because 1021020143 - 2¹⁰ = 1021019119 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 (1021020149) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3084488 + ... + 3084818.

It is an arithmetic number, because the mean of its divisors is an integer number (26427366).

Almost surely, 2^1021020143 is an apocalyptic number.

1021020143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1021020143 is a deficient number, since it is larger than the sum of its proper divisors (247493425).

1021020143 is a wasteful number, since it uses less digits than its factorization.

1021020143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 445 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1021020143 is about 31953.4058122135. The cubic root of 1021020143 is about 1006.9581856886.

Adding to 1021020143 its reverse (3410201201), we get a palindrome (4431221344).

The spelling of 1021020143 in words is "one billion, twenty-one million, twenty thousand, one hundred forty-three".