1030111103261 has 2 divisors, whose sum is σ = 1030111103262. Its totient is φ = 1030111103260.

The previous prime is 1030111103257. The next prime is 1030111103291. The reversal of 1030111103261 is 1623011110301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624684736900 + 405426366361 = 790370^2 + 636731^2 .

It is a cyclic number.

It is not a de Polignac number, because 1030111103261 - 2² = 1030111103257 is a prime.

It is a super-2 number, since 2×1030111103261² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1030111103291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515055551630 + 515055551631.

It is an arithmetic number, because the mean of its divisors is an integer number (515055551631).

Almost surely, 2^{1030111103261} is an apocalyptic number.

It is an amenable number.

1030111103261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1030111103261 is an equidigital number, since it uses as much as digits as its factorization.

1030111103261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1030111103261 its reverse (1623011110301), we get a palindrome (2653122213562).

The spelling of 1030111103261 in words is "one trillion, thirty billion, one hundred eleven million, one hundred three thousand, two hundred sixty-one".