2021415621 has 32 divisors (see below), whose sum is σ = 2814248448. Its totient is φ = 1289648640.

The previous prime is 2021415611. The next prime is 2021415629. The reversal of 2021415621 is 1265141202.

It is not a de Polignac number, because 2021415621 - 2⁵ = 2021415589 is a prime.

It is a super-2 number, since 2×2021415621² = 8172242225645631282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021415591 and 2021415600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021415629) 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 31 ways as a sum of consecutive naturals, for example, 1693801 + ... + 1694993.

It is an arithmetic number, because the mean of its divisors is an integer number (87945264).

Almost surely, 2^2021415621 is an apocalyptic number.

It is an amenable number.

2021415621 is a deficient number, since it is larger than the sum of its proper divisors (792832827).

2021415621 is a wasteful number, since it uses less digits than its factorization.

2021415621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 2021415621 is about 44960.1559272207. The cubic root of 2021415621 is about 1264.4020923153.

Adding to 2021415621 its reverse (1265141202), we get a palindrome (3286556823).

The spelling of 2021415621 in words is "two billion, twenty-one million, four hundred fifteen thousand, six hundred twenty-one".