103012321221 has 24 divisors (see below), whose sum is σ = 151108706840. Its totient is φ = 67614621696.

The previous prime is 103012321201. The next prime is 103012321231. The reversal of 103012321221 is 122123210301.

103012321221 is a `hidden beast` number, since 10 + 301 + 232 + 122 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 57972996 + 102954348225 = 7614^2 + 320865^2 .

It is not a de Polignac number, because 103012321221 - 2⁵ = 103012321189 is a prime.

It is a super-2 number, since 2×103012321221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 103012321194 and 103012321203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103012321201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137206 + ... + 474183.

Almost surely, 2^103012321221 is an apocalyptic number.

It is an amenable number.

103012321221 is a deficient number, since it is larger than the sum of its proper divisors (48096385619).

103012321221 is a wasteful number, since it uses less digits than its factorization.

103012321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611685 (or 611682 counting only the distinct ones).

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

Adding to 103012321221 its reverse (122123210301), we get a palindrome (225135531522).

The spelling of 103012321221 in words is "one hundred three billion, twelve million, three hundred twenty-one thousand, two hundred twenty-one".