1220000019971 has 2 divisors, whose sum is σ = 1220000019972. Its totient is φ = 1220000019970.

The previous prime is 1220000019961. The next prime is 1220000020021. The reversal of 1220000019971 is 1799100000221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220000019971 - 2²⁶ = 1219932911107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1220000019911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610000009985 + 610000009986.

It is an arithmetic number, because the mean of its divisors is an integer number (610000009986).

Almost surely, 2^{1220000019971} is an apocalyptic number.

1220000019971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220000019971 is an equidigital number, since it uses as much as digits as its factorization.

1220000019971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 32.

The spelling of 1220000019971 in words is "one trillion, two hundred twenty billion, nineteen thousand, nine hundred seventy-one".