118013212561 has 2 divisors, whose sum is σ = 118013212562. Its totient is φ = 118013212560.

The previous prime is 118013212553. The next prime is 118013212571. The reversal of 118013212561 is 165212310811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66316550400 + 51696662161 = 257520^2 + 227369^2 .

It is a cyclic number.

It is not a de Polignac number, because 118013212561 - 2³ = 118013212553 is a prime.

It is not a weakly prime, because it can be changed into another prime (118013212531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59006606280 + 59006606281.

It is an arithmetic number, because the mean of its divisors is an integer number (59006606281).

Almost surely, 2^118013212561 is an apocalyptic number.

It is an amenable number.

118013212561 is a deficient number, since it is larger than the sum of its proper divisors (1).

118013212561 is an equidigital number, since it uses as much as digits as its factorization.

118013212561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 31.

The spelling of 118013212561 in words is "one hundred eighteen billion, thirteen million, two hundred twelve thousand, five hundred sixty-one".