1021120100403 has 32 divisors (see below), whose sum is σ = 1552551307776. Its totient is φ = 591387836928.

The previous prime is 1021120100393. The next prime is 1021120100419. The reversal of 1021120100403 is 3040010211201.

It is not a de Polignac number, because 1021120100403 - 2¹² = 1021120096307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021120101403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25908250 + ... + 25947632.

It is an arithmetic number, because the mean of its divisors is an integer number (48517228368).

Almost surely, 2^{1021120100403} is an apocalyptic number.

1021120100403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1021120100403 is a deficient number, since it is larger than the sum of its proper divisors (531431207373).

1021120100403 is a wasteful number, since it uses less digits than its factorization.

1021120100403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78523.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1021120100403 its reverse (3040010211201), we get a palindrome (4061130311604).

The spelling of 1021120100403 in words is "one trillion, twenty-one billion, one hundred twenty million, one hundred thousand, four hundred three".