1223000031731 has 2 divisors, whose sum is σ = 1223000031732. Its totient is φ = 1223000031730.

The previous prime is 1223000031727. The next prime is 1223000031749. The reversal of 1223000031731 is 1371300003221.

It is a weak prime.

It is an emirp because it is prime and its reverse (1371300003221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223000031731 - 2² = 1223000031727 is a prime.

It is a super-2 number, since 2×1223000031731² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1223000031697 and 1223000031706.

It is not a weakly prime, because it can be changed into another prime (1223000031761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611500015865 + 611500015866.

It is an arithmetic number, because the mean of its divisors is an integer number (611500015866).

Almost surely, 2^{1223000031731} is an apocalyptic number.

1223000031731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223000031731 is an equidigital number, since it uses as much as digits as its factorization.

1223000031731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 23.

Adding to 1223000031731 its reverse (1371300003221), we get a palindrome (2594300034952).

The spelling of 1223000031731 in words is "one trillion, two hundred twenty-three billion, thirty-one thousand, seven hundred thirty-one".