2121016 has 16 divisors (see below), whose sum is σ = 4062240. Its totient is φ = 1037760.

The previous prime is 2121011. The next prime is 2121017. The reversal of 2121016 is 6101212.

2121016 = 189² + 190² + ... + 235².

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 = 2120987 and 2121005.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2445 + ... + 3196.

It is an arithmetic number, because the mean of its divisors is an integer number (253890).

2^2121016 is an apocalyptic number.

It is an amenable number.

2121016 is a deficient number, since it is larger than the sum of its proper divisors (1941224).

2121016 is a wasteful number, since it uses less digits than its factorization.

2121016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5694 (or 5690 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2121016 is about 1456.3708318969. The cubic root of 2121016 is about 128.4836842825.

Adding to 2121016 its reverse (6101212), we get a palindrome (8222228).

The spelling of 2121016 in words is "two million, one hundred twenty-one thousand, sixteen".