2121212 has 6 divisors (see below), whose sum is σ = 3712128. Its totient is φ = 1060604.

The previous prime is 2121199. The next prime is 2121239.

It is a happy number.

2121212 is nontrivially palindromic in base 10.

2121212 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a nude number because it is divisible by every one of its digits.

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

2121212 is an undulating number in base 10.

2121212 is a modest number, since divided by 1212 gives 212 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 2121193 and 2121202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265148 + ... + 265155.

It is an arithmetic number, because the mean of its divisors is an integer number (618688).

2^2121212 is an apocalyptic number.

It is an amenable number.

2121212 is a deficient number, since it is larger than the sum of its proper divisors (1590916).

2121212 is a wasteful number, since it uses less digits than its factorization.

2121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530307 (or 530305 counting only the distinct ones).

The product of its digits is 16, while the sum is 11.

The square root of 2121212 is about 1456.4381208963. The cubic root of 2121212 is about 128.4876418240.

Multiplying 2121212 by its sum of digits (11), we get a palindrome (23333332).

The spelling of 2121212 in words is "two million, one hundred twenty-one thousand, two hundred twelve".