1220120221973 has 2 divisors, whose sum is σ = 1220120221974. Its totient is φ = 1220120221972.

The previous prime is 1220120221967. The next prime is 1220120222063. The reversal of 1220120221973 is 3791220210221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1000626097969 + 219494124004 = 1000313^2 + 468502^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220120221973 - 2²⁰ = 1220119173397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220120221913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610060110986 + 610060110987.

It is an arithmetic number, because the mean of its divisors is an integer number (610060110987).

Almost surely, 2^{1220120221973} is an apocalyptic number.

It is an amenable number.

1220120221973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220120221973 is an equidigital number, since it uses as much as digits as its factorization.

1220120221973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 1220120221973 in words is "one trillion, two hundred twenty billion, one hundred twenty million, two hundred twenty-one thousand, nine hundred seventy-three".