1021212 has 36 divisors (see below), whose sum is σ = 2719080. Its totient is φ = 322272.

The previous prime is 1021199. The next prime is 1021217. The reversal of 1021212 is 2121201.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1021194 and 1021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63 + ... + 1430.

It is an arithmetic number, because the mean of its divisors is an integer number (75530).

2^1021212 is an apocalyptic number.

1021212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1359540).

1021212 is an abundant number, since it is smaller than the sum of its proper divisors (1697868).

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

1021212 is a wasteful number, since it uses less digits than its factorization.

1021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1021212 is about 1010.5503451090. The cubic root of 1021212 is about 100.7021253291.

Adding to 1021212 its reverse (2121201), we get a palindrome (3142413).

The spelling of 1021212 in words is "one million, twenty-one thousand, two hundred twelve".