1203400043021 has 12 divisors (see below), whose sum is σ = 1323238135296. Its totient is φ = 1093592598120.

The previous prime is 1203400043009. The next prime is 1203400043047.

1203400043021 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1203400043021 - 2¹⁰ = 1203400041997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1203400042984 and 1203400043002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203450043021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1525535 + ... + 2175788.

It is an arithmetic number, because the mean of its divisors is an integer number (110269844608).

Almost surely, 2^{1203400043021} is an apocalyptic number.

1203400043021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1203400043021 is a deficient number, since it is larger than the sum of its proper divisors (119838092275).

1203400043021 is a wasteful number, since it uses less digits than its factorization.

1203400043021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704032 (or 3704021 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

It can be divided in two parts, 12034000 and 43021, that added together give a palindrome (12077021).

The spelling of 1203400043021 in words is "one trillion, two hundred three billion, four hundred million, forty-three thousand, twenty-one".