2021211406 has 32 divisors (see below), whose sum is σ = 3140140032. Its totient is φ = 975218400.

The previous prime is 2021211403. The next prime is 2021211433. The reversal of 2021211406 is 6041121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021211403) 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 15 ways as a sum of consecutive naturals, for example, 2228005 + ... + 2228911.

It is an arithmetic number, because the mean of its divisors is an integer number (98129376).

Almost surely, 2^2021211406 is an apocalyptic number.

2021211406 is a deficient number, since it is larger than the sum of its proper divisors (1118928626).

2021211406 is a wasteful number, since it uses less digits than its factorization.

2021211406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2021211406 is about 44957.8848034469. The cubic root of 2021211406 is about 1264.3595118308.

Adding to 2021211406 its reverse (6041121202), we get a palindrome (8062332608).

The spelling of 2021211406 in words is "two billion, twenty-one million, two hundred eleven thousand, four hundred six".