118920220154921 has 2 divisors, whose sum is σ = 118920220154922. Its totient is φ = 118920220154920.

The previous prime is 118920220154849. The next prime is 118920220155101. The reversal of 118920220154921 is 129451022029811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117047731699600 + 1872488455321 = 10818860^2 + 1368389^2 .

It is an emirp because it is prime and its reverse (129451022029811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118920220154921 - 2¹⁸ = 118920219892777 is a prime.

It is not a weakly prime, because it can be changed into another prime (118920220156921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59460110077460 + 59460110077461.

It is an arithmetic number, because the mean of its divisors is an integer number (59460110077461).

Almost surely, 2^{118920220154921} is an apocalyptic number.

It is an amenable number.

118920220154921 is a deficient number, since it is larger than the sum of its proper divisors (1).

118920220154921 is an equidigital number, since it uses as much as digits as its factorization.

118920220154921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 118920220154921 in words is "one hundred eighteen trillion, nine hundred twenty billion, two hundred twenty million, one hundred fifty-four thousand, nine hundred twenty-one".