2021211425 has 12 divisors (see below), whose sum is σ = 2506861500. Its totient is φ = 1616608320.

The previous prime is 2021211403. The next prime is 2021211433. The reversal of 2021211425 is 5241121202.

It can be written as a sum of positive squares in 6 ways, for example, as 447026449 + 1574184976 = 21143^2 + 39676^2 .

It is not a de Polignac number, because 2021211425 - 2²⁰ = 2020162849 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2021211397 and 2021211406.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202451 + ... + 212199.

It is an arithmetic number, because the mean of its divisors is an integer number (208905125).

Almost surely, 2^2021211425 is an apocalyptic number.

2021211425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2021211425 is a deficient number, since it is larger than the sum of its proper divisors (485650075).

2021211425 is an equidigital number, since it uses as much as digits as its factorization.

2021211425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18052 (or 18047 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2021211425 is about 44957.8850147558. The cubic root of 2021211425 is about 1264.3595157926.

Adding to 2021211425 its reverse (5241121202), we get a palindrome (7262332627).

The spelling of 2021211425 in words is "two billion, twenty-one million, two hundred eleven thousand, four hundred twenty-five".