1021213212 has 24 divisors (see below), whose sum is σ = 2384118912. Its totient is φ = 340220400.

The previous prime is 1021213111. The next prime is 1021213247. The reversal of 1021213212 is 2123121201.

It is a junction number, because it is equal to n+sod(n) for n = 1021213191 and 1021213200.

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, 1137 + ... + 45207.

It is an arithmetic number, because the mean of its divisors is an integer number (99338288).

Almost surely, 2^1021213212 is an apocalyptic number.

1021213212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021213212 is an abundant number, since it is smaller than the sum of its proper divisors (1362905700).

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

1021213212 is a wasteful number, since it uses less digits than its factorization.

1021213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46009 (or 46007 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1021213212 is about 31956.4267714649. The cubic root of 1021213212 is about 1007.0216516768.

Adding to 1021213212 its reverse (2123121201), we get a palindrome (3144334413).

The spelling of 1021213212 in words is "one billion, twenty-one million, two hundred thirteen thousand, two hundred twelve".