1221004004083 has 2 divisors, whose sum is σ = 1221004004084. Its totient is φ = 1221004004082.

The previous prime is 1221004004009. The next prime is 1221004004089. The reversal of 1221004004083 is 3804004001221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221004004083 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221004004089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610502002041 + 610502002042.

It is an arithmetic number, because the mean of its divisors is an integer number (610502002042).

Almost surely, 2^{1221004004083} is an apocalyptic number.

1221004004083 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221004004083 is an equidigital number, since it uses as much as digits as its factorization.

1221004004083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 25.

The spelling of 1221004004083 in words is "one trillion, two hundred twenty-one billion, four million, four thousand, eighty-three".