121121212 has 6 divisors (see below), whose sum is σ = 211962128. Its totient is φ = 60560604.

The previous prime is 121121201. The next prime is 121121213. The reversal of 121121212 is 212121121.

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

It is a junction number, because it is equal to n+sod(n) for n = 121121192 and 121121201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15140148 + ... + 15140155.

Almost surely, 2^121121212 is an apocalyptic number.

It is an amenable number.

121121212 is a deficient number, since it is larger than the sum of its proper divisors (90840916).

121121212 is a wasteful number, since it uses less digits than its factorization.

121121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30280307 (or 30280305 counting only the distinct ones).

The product of its digits is 16, while the sum is 13.

The square root of 121121212 is about 11005.5082572319. The cubic root of 121121212 is about 494.7738476501.

Adding to 121121212 its reverse (212121121), we get a palindrome (333242333).

Subtracting 121121212 from its reverse (212121121), we obtain a palindrome (90999909).

It can be divided in two parts, 121121 and 212, that multiplied together give a palindrome (25677652).

The spelling of 121121212 in words is "one hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".