381243121069 has 16 divisors (see below), whose sum is σ = 401307713856. Its totient is φ = 361701763200.

The previous prime is 381243121013. The next prime is 381243121097. The reversal of 381243121069 is 960121342183.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 381243121069 - 2¹⁷ = 381242989997 is a prime.

It is a super-2 number, since 2×381243121069² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381243121009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2864254 + ... + 2994400.

It is an arithmetic number, because the mean of its divisors is an integer number (25081732116).

Almost surely, 2^381243121069 is an apocalyptic number.

It is an amenable number.

381243121069 is a deficient number, since it is larger than the sum of its proper divisors (20064592787).

381243121069 is a wasteful number, since it uses less digits than its factorization.

381243121069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132156.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 381243121069 in words is "three hundred eighty-one billion, two hundred forty-three million, one hundred twenty-one thousand, sixty-nine".