1021143421 has 8 divisors (see below), whose sum is σ = 1041037920. Its totient is φ = 1001272272.

The previous prime is 1021143419. The next prime is 1021143457. The reversal of 1021143421 is 1243411201.

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 1021143421 - 2¹ = 1021143419 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 (1021143401) 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, 101350 + ... + 110968.

It is an arithmetic number, because the mean of its divisors is an integer number (130129740).

Almost surely, 2^1021143421 is an apocalyptic number.

It is an amenable number.

1021143421 is a deficient number, since it is larger than the sum of its proper divisors (19894499).

1021143421 is an equidigital number, since it uses as much as digits as its factorization.

1021143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11675.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1021143421 is about 31955.3347815353. The cubic root of 1021143421 is about 1006.9987107773.

Adding to 1021143421 its reverse (1243411201), we get a palindrome (2264554622).

The spelling of 1021143421 in words is "one billion, twenty-one million, one hundred forty-three thousand, four hundred twenty-one".