120821212 has 6 divisors (see below), whose sum is σ = 211437128. Its totient is φ = 60410604.

The previous prime is 120821201. The next prime is 120821251. The reversal of 120821212 is 212128021.

It is a self number, because there is not a number n which added to its sum of digits gives 120821212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15102648 + ... + 15102655.

Almost surely, 2^120821212 is an apocalyptic number.

It is an amenable number.

120821212 is a deficient number, since it is larger than the sum of its proper divisors (90615916).

120821212 is a wasteful number, since it uses less digits than its factorization.

120821212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30205307 (or 30205305 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 120821212 is about 10991.8702685212. The cubic root of 120821212 is about 494.3650151283.

Adding to 120821212 its reverse (212128021), we get a palindrome (332949233).

The spelling of 120821212 in words is "one hundred twenty million, eight hundred twenty-one thousand, two hundred twelve".