20210221210 has 32 divisors (see below), whose sum is σ = 37968279552. Its totient is φ = 7730933760.

The previous prime is 20210221159. The next prime is 20210221217. The reversal of 20210221210 is 1212201202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20210221217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1819975 + ... + 1831045.

It is an arithmetic number, because the mean of its divisors is an integer number (1186508736).

Almost surely, 2^20210221210 is an apocalyptic number.

20210221210 is a deficient number, since it is larger than the sum of its proper divisors (17758058342).

20210221210 is a wasteful number, since it uses less digits than its factorization.

20210221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19038.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20210221210 its reverse (1212201202), we get a palindrome (21422422412).

The spelling of 20210221210 in words is "twenty billion, two hundred ten million, two hundred twenty-one thousand, two hundred ten".