1221833674643 has 2 divisors, whose sum is σ = 1221833674644. Its totient is φ = 1221833674642.

The previous prime is 1221833674591. The next prime is 1221833674667. The reversal of 1221833674643 is 3464763381221.

It is a strong prime.

It is an emirp because it is prime and its reverse (3464763381221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221833674643 - 2²⁶ = 1221766565779 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221833674591 and 1221833674600.

It is not a weakly prime, because it can be changed into another prime (1221833676643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610916837321 + 610916837322.

It is an arithmetic number, because the mean of its divisors is an integer number (610916837322).

Almost surely, 2^{1221833674643} is an apocalyptic number.

1221833674643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221833674643 is an equidigital number, since it uses as much as digits as its factorization.

1221833674643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 50.

The spelling of 1221833674643 in words is "one trillion, two hundred twenty-one billion, eight hundred thirty-three million, six hundred seventy-four thousand, six hundred forty-three".