1031103400221 has 16 divisors (see below), whose sum is σ = 1528023481920. Its totient is φ = 687193966800.

The previous prime is 1031103400211. The next prime is 1031103400309. The reversal of 1031103400221 is 1220043011301.

1031103400221 is a `hidden beast` number, since 1 + 0 + 31 + 10 + 3 + 400 + 221 = 666.

It is not a de Polignac number, because 1031103400221 - 2¹⁸ = 1031103138077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1031103400194 and 1031103400203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031103400211) 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 15 ways as a sum of consecutive naturals, for example, 5695335 + ... + 5873588.

It is an arithmetic number, because the mean of its divisors is an integer number (95501467620).

Almost surely, 2^{1031103400221} is an apocalyptic number.

It is an amenable number.

1031103400221 is a deficient number, since it is larger than the sum of its proper divisors (496920081699).

1031103400221 is a wasteful number, since it uses less digits than its factorization.

1031103400221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11572233 (or 11572227 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1031103400221 its reverse (1220043011301), we get a palindrome (2251146411522).

The spelling of 1031103400221 in words is "one trillion, thirty-one billion, one hundred three million, four hundred thousand, two hundred twenty-one".