103012231221 has 24 divisors (see below), whose sum is σ = 163383240384. Its totient is φ = 64635122880.

The previous prime is 103012231213. The next prime is 103012231279. The reversal of 103012231221 is 122132210301.

103012231221 is a `hidden beast` number, since 10 + 301 + 22 + 312 + 21 = 666.

It is not a de Polignac number, because 103012231221 - 2³ = 103012231213 is a prime.

It is a super-2 number, since 2×103012231221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 103012231194 and 103012231203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103012231291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12464065 + ... + 12472326.

It is an arithmetic number, because the mean of its divisors is an integer number (6807635016).

Almost surely, 2^103012231221 is an apocalyptic number.

It is an amenable number.

103012231221 is a deficient number, since it is larger than the sum of its proper divisors (60371009163).

103012231221 is an equidigital number, since it uses as much as digits as its factorization.

103012231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24936423 (or 24936411 counting only the distinct ones).

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

Adding to 103012231221 its reverse (122132210301), we get a palindrome (225144441522).

The spelling of 103012231221 in words is "one hundred three billion, twelve million, two hundred thirty-one thousand, two hundred twenty-one".