1021421433255 has 8 divisors (see below), whose sum is σ = 1634274293232. Its totient is φ = 544758097728.

The previous prime is 1021421433251. The next prime is 1021421433269. The reversal of 1021421433255 is 5523341241201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021421433255 - 2² = 1021421433251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021421433251) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 34047381094 + ... + 34047381123.

It is an arithmetic number, because the mean of its divisors is an integer number (204284286654).

Almost surely, 2^{1021421433255} is an apocalyptic number.

1021421433255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1021421433255 is a deficient number, since it is larger than the sum of its proper divisors (612852859977).

1021421433255 is an equidigital number, since it uses as much as digits as its factorization.

1021421433255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68094762225.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 1021421433255 its reverse (5523341241201), we get a palindrome (6544762674456).

The spelling of 1021421433255 in words is "one trillion, twenty-one billion, four hundred twenty-one million, four hundred thirty-three thousand, two hundred fifty-five".