2021221210 has 32 divisors (see below), whose sum is σ = 3673257984. Its totient is φ = 800736000.

The previous prime is 2021221199. The next prime is 2021221231. The reversal of 2021221210 is 121221202.

It is a happy number.

It is an unprimeable number.

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, 458115 + ... + 462505.

It is an arithmetic number, because the mean of its divisors is an integer number (114789312).

Almost surely, 2^2021221210 is an apocalyptic number.

2021221210 is a deficient number, since it is larger than the sum of its proper divisors (1652036774).

2021221210 is a wasteful number, since it uses less digits than its factorization.

2021221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830.

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

The square root of 2021221210 is about 44957.9938386935. The cubic root of 2021221210 is about 1264.3615561099.

Adding to 2021221210 its reverse (121221202), we get a palindrome (2142442412).

The spelling of 2021221210 in words is "two billion, twenty-one million, two hundred twenty-one thousand, two hundred ten".