1021043423400 has 1152 divisors, whose sum is σ = 4398804291840. Its totient is φ = 190505779200.

The previous prime is 1021043423369. The next prime is 1021043423441. The reversal of 1021043423400 is 43243401201.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 244442112 + ... + 244446288.

Almost surely, 2^{1021043423400} is an apocalyptic number.

1021043423400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021043423400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2199402145920).

1021043423400 is an abundant number, since it is smaller than the sum of its proper divisors (3377760868440).

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

1021043423400 is a wasteful number, since it uses less digits than its factorization.

1021043423400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4275 (or 4255 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1021043423400 its reverse (43243401201), we get a palindrome (1064286824601).

The spelling of 1021043423400 in words is "one trillion, twenty-one billion, forty-three million, four hundred twenty-three thousand, four hundred".