1201977004391 has 2 divisors, whose sum is σ = 1201977004392. Its totient is φ = 1201977004390.

The previous prime is 1201977004379. The next prime is 1201977004427. The reversal of 1201977004391 is 1934007791021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201977004391 - 2³⁸ = 927099097447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201977504391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600988502195 + 600988502196.

It is an arithmetic number, because the mean of its divisors is an integer number (600988502196).

Almost surely, 2^{1201977004391} is an apocalyptic number.

1201977004391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201977004391 is an equidigital number, since it uses as much as digits as its factorization.

1201977004391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 44.

The spelling of 1201977004391 in words is "one trillion, two hundred one billion, nine hundred seventy-seven million, four thousand, three hundred ninety-one".