1021221212 has 24 divisors (see below), whose sum is σ = 2064288240. Its totient is φ = 436885760.

The previous prime is 1021221203. The next prime is 1021221239. The reversal of 1021221212 is 2121221201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681887 + ... + 683382.

It is an arithmetic number, because the mean of its divisors is an integer number (86012010).

Almost surely, 2^1021221212 is an apocalyptic number.

It is an amenable number.

1021221212 is an abundant number, since it is smaller than the sum of its proper divisors (1043067028).

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

1021221212 is a wasteful number, since it uses less digits than its factorization.

1021221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365301 (or 1365299 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1021221212 is about 31956.5519416598. The cubic root of 1021221212 is about 1007.0242812786.

Adding to 1021221212 its reverse (2121221201), we get a palindrome (3142442413).

The spelling of 1021221212 in words is "one billion, twenty-one million, two hundred twenty-one thousand, two hundred twelve".