1021221413 has 8 divisors (see below), whose sum is σ = 1075970688. Its totient is φ = 967334544.

The previous prime is 1021221379. The next prime is 1021221469. The reversal of 1021221413 is 3141221201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021221413 - 2²⁴ = 1004444197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021221391 and 1021221400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021221473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213170 + ... + 217907.

It is an arithmetic number, because the mean of its divisors is an integer number (134496336).

Almost surely, 2^1021221413 is an apocalyptic number.

It is an amenable number.

1021221413 is a deficient number, since it is larger than the sum of its proper divisors (54749275).

1021221413 is a wasteful number, since it uses less digits than its factorization.

1021221413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431203.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1021221413 is about 31956.5550865546. Note that the first 3 decimals coincide. The cubic root of 1021221413 is about 1007.0243473472.

Adding to 1021221413 its reverse (3141221201), we get a palindrome (4162442614).

The spelling of 1021221413 in words is "one billion, twenty-one million, two hundred twenty-one thousand, four hundred thirteen".