1123221121031 has 2 divisors, whose sum is σ = 1123221121032. Its totient is φ = 1123221121030.

The previous prime is 1123221120979. The next prime is 1123221121051. The reversal of 1123221121031 is 1301211223211.

It is an a-pointer prime, because the next prime (1123221121051) can be obtained adding 1123221121031 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123221121031 - 2¹⁴ = 1123221104647 is a prime.

It is a super-2 number, since 2×1123221121031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123221120994 and 1123221121012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123221121051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561610560515 + 561610560516.

It is an arithmetic number, because the mean of its divisors is an integer number (561610560516).

Almost surely, 2^{1123221121031} is an apocalyptic number.

1123221121031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123221121031 is an equidigital number, since it uses as much as digits as its factorization.

1123221121031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1123221121031 its reverse (1301211223211), we get a palindrome (2424432344242).

The spelling of 1123221121031 in words is "one trillion, one hundred twenty-three billion, two hundred twenty-one million, one hundred twenty-one thousand, thirty-one".