1030120031221 has 2 divisors, whose sum is σ = 1030120031222. Its totient is φ = 1030120031220.

The previous prime is 1030120031191. The next prime is 1030120031287. The reversal of 1030120031221 is 1221300210301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 748276900900 + 281843130321 = 865030^2 + 530889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1030120031221 - 2¹⁷ = 1030119900149 is a prime.

It is a super-2 number, since 2×1030120031221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1030120031195 and 1030120031204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1030120031021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515060015610 + 515060015611.

It is an arithmetic number, because the mean of its divisors is an integer number (515060015611).

Almost surely, 2^{1030120031221} is an apocalyptic number.

It is an amenable number.

1030120031221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1030120031221 is an equidigital number, since it uses as much as digits as its factorization.

1030120031221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1030120031221 its reverse (1221300210301), we get a palindrome (2251420241522).

The spelling of 1030120031221 in words is "one trillion, thirty billion, one hundred twenty million, thirty-one thousand, two hundred twenty-one".