1221002022049 has 2 divisors, whose sum is σ = 1221002022050. Its totient is φ = 1221002022048.

The previous prime is 1221002021977. The next prime is 1221002022067. The reversal of 1221002022049 is 9402202001221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1095078531600 + 125923490449 = 1046460^2 + 354857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221002022049 - 2²⁵ = 1220968467617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221002022949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610501011024 + 610501011025.

It is an arithmetic number, because the mean of its divisors is an integer number (610501011025).

Almost surely, 2^{1221002022049} is an apocalyptic number.

It is an amenable number.

1221002022049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221002022049 is an equidigital number, since it uses as much as digits as its factorization.

1221002022049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 1221002022049 in words is "one trillion, two hundred twenty-one billion, two million, twenty-two thousand, forty-nine".