1021200143 has 8 divisors (see below), whose sum is σ = 1044522000. Its totient is φ = 998078848.

The previous prime is 1021200119. The next prime is 1021200197. The reversal of 1021200143 is 3410021201.

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

It is a cyclic number.

It is not a de Polignac number, because 1021200143 - 2¹⁸ = 1020937999 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 (1021200643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39818 + ... + 60231.

It is an arithmetic number, because the mean of its divisors is an integer number (130565250).

Almost surely, 2^1021200143 is an apocalyptic number.

1021200143 is a deficient number, since it is larger than the sum of its proper divisors (23321857).

1021200143 is a wasteful number, since it uses less digits than its factorization.

1021200143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100281.

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

The square root of 1021200143 is about 31956.2222892506. Note that the first 4 decimals coincide. The cubic root of 1021200143 is about 1007.0173558641.

Adding to 1021200143 its reverse (3410021201), we get a palindrome (4431221344).

The spelling of 1021200143 in words is "one billion, twenty-one million, two hundred thousand, one hundred forty-three".