2102121010 has 16 divisors (see below), whose sum is σ = 4127801472. Its totient is φ = 764407600.

The previous prime is 2102120989. The next prime is 2102121011. The reversal of 2102121010 is 101212012.

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 (2102121011) 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 7 ways as a sum of consecutive naturals, for example, 9554986 + ... + 9555205.

It is an arithmetic number, because the mean of its divisors is an integer number (257987592).

Almost surely, 2^2102121010 is an apocalyptic number.

2102121010 is a deficient number, since it is larger than the sum of its proper divisors (2025680462).

2102121010 is a wasteful number, since it uses less digits than its factorization.

2102121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19110209.

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

The square root of 2102121010 is about 45848.8932254640. The cubic root of 2102121010 is about 1281.0101502725.

Adding to 2102121010 its reverse (101212012), we get a palindrome (2203333022).

The spelling of 2102121010 in words is "two billion, one hundred two million, one hundred twenty-one thousand, ten".