1211020212 has 48 divisors (see below), whose sum is σ = 2906933120. Its totient is φ = 392107392.

The previous prime is 1211020207. The next prime is 1211020229. The reversal of 1211020212 is 2120201121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312873 + ... + 316719.

Almost surely, 2^1211020212 is an apocalyptic number.

1211020212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211020212 is an abundant number, since it is smaller than the sum of its proper divisors (1695912908).

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

1211020212 is a wasteful number, since it uses less digits than its factorization.

1211020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600 (or 4598 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1211020212 is about 34799.7156884938. The cubic root of 1211020212 is about 1065.9016402904.

Adding to 1211020212 its reverse (2120201121), we get a palindrome (3331221333).

The spelling of 1211020212 in words is "one billion, two hundred eleven million, twenty thousand, two hundred twelve".