121020212 has 12 divisors (see below), whose sum is σ = 224243460. Its totient is φ = 56950656.

The previous prime is 121020209. The next prime is 121020241. The reversal of 121020212 is 212020121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 69122596 + 51897616 = 8314^2 + 7204^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121020193 and 121020202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889787 + ... + 889922.

It is an arithmetic number, because the mean of its divisors is an integer number (18686955).

Almost surely, 2^121020212 is an apocalyptic number.

It is an amenable number.

121020212 is a deficient number, since it is larger than the sum of its proper divisors (103223248).

121020212 is a wasteful number, since it uses less digits than its factorization.

121020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779730 (or 1779728 counting only the distinct ones).

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

The square root of 121020212 is about 11000.9186889096. The cubic root of 121020212 is about 494.6362828245.

Adding to 121020212 its reverse (212020121), we get a palindrome (333040333).

Subtracting 121020212 from its reverse (212020121), we obtain a palindrome (90999909).

The spelling of 121020212 in words is "one hundred twenty-one million, twenty thousand, two hundred twelve".