1021311212 has 24 divisors (see below), whose sum is σ = 1860032160. Its totient is φ = 490085120.

The previous prime is 1021311211. The next prime is 1021311281. The reversal of 1021311212 is 2121131201.

It is not an unprimeable number, because it can be changed into a prime (1021311211) 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, 6989 + ... + 45732.

It is an arithmetic number, because the mean of its divisors is an integer number (77501340).

Almost surely, 2^1021311212 is an apocalyptic number.

It is an amenable number.

1021311212 is a deficient number, since it is larger than the sum of its proper divisors (838720948).

1021311212 is a wasteful number, since it uses less digits than its factorization.

1021311212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52921 (or 52919 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1021311212 is about 31957.9600725703. The cubic root of 1021311212 is about 1007.0538633521.

Adding to 1021311212 its reverse (2121131201), we get a palindrome (3142442413).

The spelling of 1021311212 in words is "one billion, twenty-one million, three hundred eleven thousand, two hundred twelve".