381024121 has 2 divisors, whose sum is σ = 381024122. Its totient is φ = 381024120.

The previous prime is 381024101. The next prime is 381024139. The reversal of 381024121 is 121420183.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297045225 + 83978896 = 17235^2 + 9164^2 .

It is a cyclic number.

It is not a de Polignac number, because 381024121 - 2⁹ = 381023609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 381024092 and 381024101.

It is not a weakly prime, because it can be changed into another prime (381024101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190512060 + 190512061.

It is an arithmetic number, because the mean of its divisors is an integer number (190512061).

Almost surely, 2^381024121 is an apocalyptic number.

It is an amenable number.

381024121 is a deficient number, since it is larger than the sum of its proper divisors (1).

381024121 is an equidigital number, since it uses as much as digits as its factorization.

381024121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 381024121 is about 19519.8391642964. The cubic root of 381024121 is about 724.9657508989.

The spelling of 381024121 in words is "three hundred eighty-one million, twenty-four thousand, one hundred twenty-one".