1031013221123 has 2 divisors, whose sum is σ = 1031013221124. Its totient is φ = 1031013221122.

The previous prime is 1031013221113. The next prime is 1031013221137. The reversal of 1031013221123 is 3211223101301.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1031013221123 - 2⁶ = 1031013221059 is a prime.

It is a super-2 number, since 2×1031013221123² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1031013221095 and 1031013221104.

It is not a weakly prime, because it can be changed into another prime (1031013221113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515506610561 + 515506610562.

It is an arithmetic number, because the mean of its divisors is an integer number (515506610562).

Almost surely, 2^{1031013221123} is an apocalyptic number.

1031013221123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031013221123 is an equidigital number, since it uses as much as digits as its factorization.

1031013221123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1031013221123 its reverse (3211223101301), we get a palindrome (4242236322424).

The spelling of 1031013221123 in words is "one trillion, thirty-one billion, thirteen million, two hundred twenty-one thousand, one hundred twenty-three".