131103021 has 16 divisors (see below), whose sum is σ = 210291200. Its totient is φ = 70972848.

The previous prime is 131103017. The next prime is 131103029. The reversal of 131103021 is 120301131.

It is not a de Polignac number, because 131103021 - 2² = 131103017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131102988 and 131103006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131103029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163891 + ... + 164688.

It is an arithmetic number, because the mean of its divisors is an integer number (13143200).

Almost surely, 2^131103021 is an apocalyptic number.

It is an amenable number.

131103021 is a deficient number, since it is larger than the sum of its proper divisors (79188179).

131103021 is a wasteful number, since it uses less digits than its factorization.

131103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328608.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 131103021 is about 11450.0227510691. The cubic root of 131103021 is about 508.0084073360.

Adding to 131103021 its reverse (120301131), we get a palindrome (251404152).

The spelling of 131103021 in words is "one hundred thirty-one million, one hundred three thousand, twenty-one".