103031111221 has 2 divisors, whose sum is σ = 103031111222. Its totient is φ = 103031111220.

The previous prime is 103031111201. The next prime is 103031111233. The reversal of 103031111221 is 122111130301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76499262225 + 26531848996 = 276585^2 + 162886^2 .

It is a cyclic number.

It is not a de Polignac number, because 103031111221 - 2²³ = 103022722613 is a prime.

It is a super-2 number, since 2×103031111221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 103031111195 and 103031111204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103031111201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51515555610 + 51515555611.

It is an arithmetic number, because the mean of its divisors is an integer number (51515555611).

Almost surely, 2^103031111221 is an apocalyptic number.

It is an amenable number.

103031111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

103031111221 is an equidigital number, since it uses as much as digits as its factorization.

103031111221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 103031111221 its reverse (122111130301), we get a palindrome (225142241522).

The spelling of 103031111221 in words is "one hundred three billion, thirty-one million, one hundred eleven thousand, two hundred twenty-one".