2121010 has 16 divisors (see below), whose sum is σ = 3853656. Its totient is φ = 840448.

The previous prime is 2120981. The next prime is 2121011. The reversal of 2121010 is 101212.

2121010 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 4 ways, for example, as 1185921 + 935089 = 1089^2 + 967^2 .

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2120984 and 2121002.

It is not an unprimeable number, because it can be changed into a prime (2121011) 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, 192 + ... + 2068.

2^2121010 is an apocalyptic number.

2121010 is a deficient number, since it is larger than the sum of its proper divisors (1732646).

2121010 is a wasteful number, since it uses less digits than its factorization.

2121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 2121010 is about 1456.3687719805. The cubic root of 2121010 is about 128.4835631295.

Adding to 2121010 its reverse (101212), we get a palindrome (2222222).

The spelling of 2121010 in words is "two million, one hundred twenty-one thousand, ten".