120021564449 has 2 divisors, whose sum is σ = 120021564450. Its totient is φ = 120021564448.

The previous prime is 120021564431. The next prime is 120021564451. The reversal of 120021564449 is 944465120021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88054627600 + 31966936849 = 296740^2 + 178793^2 .

It is a cyclic number.

It is not a de Polignac number, because 120021564449 - 2²⁸ = 119753128993 is a prime.

Together with 120021564451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120021564409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010782224 + 60010782225.

It is an arithmetic number, because the mean of its divisors is an integer number (60010782225).

Almost surely, 2^120021564449 is an apocalyptic number.

It is an amenable number.

120021564449 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021564449 is an equidigital number, since it uses as much as digits as its factorization.

120021564449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 120021564449 in words is "one hundred twenty billion, twenty-one million, five hundred sixty-four thousand, four hundred forty-nine".