2312121 has 16 divisors (see below), whose sum is σ = 3677184. Its totient is φ = 1263504.

The previous prime is 2312099. The next prime is 2312137. The reversal of 2312121 is 1212132.

It is not a de Polignac number, because 2312121 - 2⁷ = 2311993 is a prime.

2312121 is a modest number, since divided by 2121 gives 231 as remainder.

2312121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2312097 and 2312106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1911 + ... + 2876.

It is an arithmetic number, because the mean of its divisors is an integer number (229824).

2^2312121 is an apocalyptic number.

2312121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2312121 is a deficient number, since it is larger than the sum of its proper divisors (1365063).

2312121 is a wasteful number, since it uses less digits than its factorization.

2312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4820.

The product of its digits is 24, while the sum is 12.

The square root of 2312121 is about 1520.5660130359. The cubic root of 2312121 is about 132.2320871057.

Adding to 2312121 its reverse (1212132), we get a palindrome (3524253).

The spelling of 2312121 in words is "two million, three hundred twelve thousand, one hundred twenty-one".