1021240403355 has 8 divisors (see below), whose sum is σ = 1633984645392. Its totient is φ = 544661548448.

The previous prime is 1021240403333. The next prime is 1021240403437. The reversal of 1021240403355 is 5533040421201.

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 1021240403355 - 2⁶ = 1021240403291 is a prime.

It is a super-2 number, since 2×1021240403355² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34041346764 + ... + 34041346793.

It is an arithmetic number, because the mean of its divisors is an integer number (204248080674).

Almost surely, 2^{1021240403355} is an apocalyptic number.

1021240403355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1021240403355 is a deficient number, since it is larger than the sum of its proper divisors (612744242037).

1021240403355 is an equidigital number, since it uses as much as digits as its factorization.

1021240403355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68082693565.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 1021240403355 its reverse (5533040421201), we get a palindrome (6554280824556).

The spelling of 1021240403355 in words is "one trillion, twenty-one billion, two hundred forty million, four hundred three thousand, three hundred fifty-five".