1220943909049 has 2 divisors, whose sum is σ = 1220943909050. Its totient is φ = 1220943909048.

The previous prime is 1220943909043. The next prime is 1220943909061. The reversal of 1220943909049 is 9409093490221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 694547226025 + 526396683024 = 833395^2 + 725532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220943909049 - 2²⁵ = 1220910354617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220943908987 and 1220943909005.

It is not a weakly prime, because it can be changed into another prime (1220943909043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610471954524 + 610471954525.

It is an arithmetic number, because the mean of its divisors is an integer number (610471954525).

Almost surely, 2^{1220943909049} is an apocalyptic number.

It is an amenable number.

1220943909049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220943909049 is an equidigital number, since it uses as much as digits as its factorization.

1220943909049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The spelling of 1220943909049 in words is "one trillion, two hundred twenty billion, nine hundred forty-three million, nine hundred nine thousand, forty-nine".