1946420743121 has 2 divisors, whose sum is σ = 1946420743122. Its totient is φ = 1946420743120.

The previous prime is 1946420743097. The next prime is 1946420743151. The reversal of 1946420743121 is 1213470246491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1465707320896 + 480713422225 = 1210664^2 + 693335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1946420743121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1946420743151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973210371560 + 973210371561.

It is an arithmetic number, because the mean of its divisors is an integer number (973210371561).

Almost surely, 2^{1946420743121} is an apocalyptic number.

It is an amenable number.

1946420743121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1946420743121 is an equidigital number, since it uses as much as digits as its factorization.

1946420743121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 1946420743121 in words is "one trillion, nine hundred forty-six billion, four hundred twenty million, seven hundred forty-three thousand, one hundred twenty-one".