1211002012 has 48 divisors (see below), whose sum is σ = 2473591680. Its totient is φ = 512913600.

The previous prime is 1211002007. The next prime is 1211002043. The reversal of 1211002012 is 2102001121.

It is a self number, because there is not a number n which added to its sum of digits gives 1211002012.

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, 39123 + ... + 62869.

It is an arithmetic number, because the mean of its divisors is an integer number (51533160).

Almost surely, 2^1211002012 is an apocalyptic number.

It is an amenable number.

1211002012 is an abundant number, since it is smaller than the sum of its proper divisors (1262589668).

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

1211002012 is a wasteful number, since it uses less digits than its factorization.

1211002012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23842 (or 23840 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1211002012 is about 34799.4541911220. The cubic root of 1211002012 is about 1065.8963005758.

Adding to 1211002012 its reverse (2102001121), we get a palindrome (3313003133).

The spelling of 1211002012 in words is "one billion, two hundred eleven million, two thousand, twelve".