1220012211973 has 2 divisors, whose sum is σ = 1220012211974. Its totient is φ = 1220012211972.

The previous prime is 1220012211959. The next prime is 1220012212021. The reversal of 1220012211973 is 3791122100221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 977571193284 + 242441018689 = 988722^2 + 492383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220012211973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220012211373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610006105986 + 610006105987.

It is an arithmetic number, because the mean of its divisors is an integer number (610006105987).

Almost surely, 2^{1220012211973} is an apocalyptic number.

It is an amenable number.

1220012211973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220012211973 is an equidigital number, since it uses as much as digits as its factorization.

1220012211973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The spelling of 1220012211973 in words is "one trillion, two hundred twenty billion, twelve million, two hundred eleven thousand, nine hundred seventy-three".