388081121 has 2 divisors, whose sum is σ = 388081122. Its totient is φ = 388081120.

The previous prime is 388081097. The next prime is 388081153. The reversal of 388081121 is 121180883.

It is a happy number.

It is an a-pointer prime, because the next prime (388081153) can be obtained adding 388081121 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312582400 + 75498721 = 17680^2 + 8689^2 .

It is a cyclic number.

It is not a de Polignac number, because 388081121 - 2²² = 383886817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (388081171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194040560 + 194040561.

It is an arithmetic number, because the mean of its divisors is an integer number (194040561).

Almost surely, 2^388081121 is an apocalyptic number.

It is an amenable number.

388081121 is a deficient number, since it is larger than the sum of its proper divisors (1).

388081121 is an equidigital number, since it uses as much as digits as its factorization.

388081121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 388081121 is about 19699.7746433811. The cubic root of 388081121 is about 729.4141299164.

The spelling of 388081121 in words is "three hundred eighty-eight million, eighty-one thousand, one hundred twenty-one".