1021344042340 has 12 divisors (see below), whose sum is σ = 2144822488956. Its totient is φ = 408537616928.

The previous prime is 1021344042319. The next prime is 1021344042371. The reversal of 1021344042340 is 432404431201.

It can be written as a sum of positive squares in 2 ways, for example, as 635859518464 + 385484523876 = 797408^2 + 620874^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1021344042299 and 1021344042308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25533601039 + ... + 25533601078.

It is an arithmetic number, because the mean of its divisors is an integer number (178735207413).

Almost surely, 2^{1021344042340} is an apocalyptic number.

1021344042340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021344042340 is an abundant number, since it is smaller than the sum of its proper divisors (1123478446616).

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

1021344042340 is a wasteful number, since it uses less digits than its factorization.

1021344042340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51067202126 (or 51067202124 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1021344042340 its reverse (432404431201), we get a palindrome (1453748473541).

The spelling of 1021344042340 in words is "one trillion, twenty-one billion, three hundred forty-four million, forty-two thousand, three hundred forty".