1121020023405 has 32 divisors (see below), whose sum is σ = 1811529532800. Its totient is φ = 591940691712.

The previous prime is 1121020023401. The next prime is 1121020023449. The reversal of 1121020023405 is 5043200201211.

It is not a de Polignac number, because 1121020023405 - 2² = 1121020023401 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121020023401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296734 + ... + 1526463.

It is an arithmetic number, because the mean of its divisors is an integer number (56610297900).

Almost surely, 2^{1121020023405} is an apocalyptic number.

1121020023405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121020023405 is a deficient number, since it is larger than the sum of its proper divisors (690509509395).

1121020023405 is a wasteful number, since it uses less digits than its factorization.

1121020023405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823613.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 1121020023405 its reverse (5043200201211), we get a palindrome (6164220224616).

The spelling of 1121020023405 in words is "one trillion, one hundred twenty-one billion, twenty million, twenty-three thousand, four hundred five".