1021234405550 has 24 divisors (see below), whose sum is σ = 1899912336816. Its totient is φ = 408404226240.

The previous prime is 1021234405549. The next prime is 1021234405591. The reversal of 1021234405550 is 555044321201.

It is a super-2 number, since 2×1021234405550² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2007767 + ... + 2464466.

It is an arithmetic number, because the mean of its divisors is an integer number (79163014034).

Almost surely, 2^{1021234405550} is an apocalyptic number.

1021234405550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021234405550 is a deficient number, since it is larger than the sum of its proper divisors (878677931266).

1021234405550 is a wasteful number, since it uses less digits than its factorization.

1021234405550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4476812 (or 4476807 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 1021234405550 its reverse (555044321201), we get a palindrome (1576278726751).

The spelling of 1021234405550 in words is "one trillion, twenty-one billion, two hundred thirty-four million, four hundred five thousand, five hundred fifty".