2021121010 has 16 divisors (see below), whose sum is σ = 3829492800. Its totient is φ = 765898416.

The previous prime is 2021120989. The next prime is 2021121017. The reversal of 2021121010 is 101211202.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (2021121017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5318550 + ... + 5318929.

It is an arithmetic number, because the mean of its divisors is an integer number (239343300).

Almost surely, 2^2021121010 is an apocalyptic number.

2021121010 is a deficient number, since it is larger than the sum of its proper divisors (1808371790).

2021121010 is a wasteful number, since it uses less digits than its factorization.

2021121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10637505.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2021121010 is about 44956.8794513142. The cubic root of 2021121010 is about 1264.3406626156.

Adding to 2021121010 its reverse (101211202), we get a palindrome (2122332212).

The spelling of 2021121010 in words is "two billion, twenty-one million, one hundred twenty-one thousand, ten".