1385011221 has 16 divisors (see below), whose sum is σ = 2015777280. Its totient is φ = 838894320.

The previous prime is 1385011207. The next prime is 1385011231. The reversal of 1385011221 is 1221105831.

It is not a de Polignac number, because 1385011221 - 2⁵ = 1385011189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1385011191 and 1385011200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385011231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47070 + ... + 70608.

It is an arithmetic number, because the mean of its divisors is an integer number (125986080).

Almost surely, 2^1385011221 is an apocalyptic number.

1385011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1385011221 is a deficient number, since it is larger than the sum of its proper divisors (630766059).

1385011221 is a wasteful number, since it uses less digits than its factorization.

1385011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25336.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 1385011221 is about 37215.7388882715. The cubic root of 1385011221 is about 1114.6822801901.

The spelling of 1385011221 in words is "one billion, three hundred eighty-five million, eleven thousand, two hundred twenty-one".