121220212 has 24 divisors (see below), whose sum is σ = 222538176. Its totient is φ = 57666048.

The previous prime is 121220201. The next prime is 121220213. The reversal of 121220212 is 212022121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121220192 and 121220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14343 + ... + 21169.

It is an arithmetic number, because the mean of its divisors is an integer number (9272424).

Almost surely, 2^121220212 is an apocalyptic number.

It is an amenable number.

121220212 is a deficient number, since it is larger than the sum of its proper divisors (101317964).

121220212 is a wasteful number, since it uses less digits than its factorization.

121220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7047 (or 7045 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 121220212 is about 11010.0050862840. The cubic root of 121220212 is about 494.9086142217.

Adding to 121220212 its reverse (212022121), we get a palindrome (333242333).

The spelling of 121220212 in words is "one hundred twenty-one million, two hundred twenty thousand, two hundred twelve".