12121662 has 32 divisors (see below), whose sum is σ = 27839232. Its totient is φ = 3446784.

The previous prime is 12121661. The next prime is 12121673. The reversal of 12121662 is 26612121.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121661) 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, 10233 + ... + 11355.

It is an arithmetic number, because the mean of its divisors is an integer number (869976).

Almost surely, 2^12121662 is an apocalyptic number.

12121662 is an abundant number, since it is smaller than the sum of its proper divisors (15717570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121662 is a wasteful number, since it uses less digits than its factorization.

12121662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392.

The product of its digits is 288, while the sum is 21.

The square root of 12121662 is about 3481.6177274365. The cubic root of 12121662 is about 229.7139607351.

Adding to 12121662 its reverse (26612121), we get a palindrome (38733783).

It can be divided in two parts, 121216 and 62, that added together give a triangular number (121278 = T₄₉₂).

The spelling of 12121662 in words is "twelve million, one hundred twenty-one thousand, six hundred sixty-two".