1223210011031 has 2 divisors, whose sum is σ = 1223210011032. Its totient is φ = 1223210011030.

The previous prime is 1223210011007. The next prime is 1223210011087. The reversal of 1223210011031 is 1301100123221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223210011031 - 2²⁶ = 1223142902167 is a prime.

It is a super-2 number, since 2×1223210011031² (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 (1223210011091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611605005515 + 611605005516.

It is an arithmetic number, because the mean of its divisors is an integer number (611605005516).

Almost surely, 2^{1223210011031} is an apocalyptic number.

1223210011031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223210011031 is an equidigital number, since it uses as much as digits as its factorization.

1223210011031 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 17.

Adding to 1223210011031 its reverse (1301100123221), we get a palindrome (2524310134252).

The spelling of 1223210011031 in words is "one trillion, two hundred twenty-three billion, two hundred ten million, eleven thousand, thirty-one".