2021400212 has 18 divisors (see below), whose sum is σ = 3830494878. Its totient is φ = 932953632.

The previous prime is 2021400209. The next prime is 2021400221. The reversal of 2021400212 is 2120041202.

It can be written as a sum of positive squares in 3 ways, for example, as 135582736 + 1885817476 = 11644^2 + 43426^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1494443 + ... + 1495794.

It is an arithmetic number, because the mean of its divisors is an integer number (212805271).

Almost surely, 2^2021400212 is an apocalyptic number.

It is an amenable number.

2021400212 is a deficient number, since it is larger than the sum of its proper divisors (1809094666).

2021400212 is a wasteful number, since it uses less digits than its factorization.

2021400212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990267 (or 2990252 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2021400212 is about 44959.9845640543. The cubic root of 2021400212 is about 1264.3988795138.

Adding to 2021400212 its reverse (2120041202), we get a palindrome (4141441414).

The spelling of 2021400212 in words is "two billion, twenty-one million, four hundred thousand, two hundred twelve".