1001443121420 has 96 divisors (see below), whose sum is σ = 2518025072640. Its totient is φ = 327316619520.

The previous prime is 1001443121407. The next prime is 1001443121423. The reversal of 1001443121420 is 241213441001.

It is not an unprimeable number, because it can be changed into a prime (1001443121423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1431215 + ... + 2012774.

It is an arithmetic number, because the mean of its divisors is an integer number (26229427840).

Almost surely, 2^{1001443121420} is an apocalyptic number.

1001443121420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001443121420 is an abundant number, since it is smaller than the sum of its proper divisors (1516581951220).

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

1001443121420 is a wasteful number, since it uses less digits than its factorization.

1001443121420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3444103 (or 3444101 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1001443121420 its reverse (241213441001), we get a palindrome (1242656562421).

The spelling of 1001443121420 in words is "one trillion, one billion, four hundred forty-three million, one hundred twenty-one thousand, four hundred twenty".