1012155212 has 12 divisors (see below), whose sum is σ = 1783160400. Its totient is φ = 502680816.

The previous prime is 1012155173. The next prime is 1012155217. The reversal of 1012155212 is 2125512101.

It is not an unprimeable number, because it can be changed into a prime (1012155217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848528 + ... + 849719.

It is an arithmetic number, because the mean of its divisors is an integer number (148596700).

Almost surely, 2^1012155212 is an apocalyptic number.

It is an amenable number.

1012155212 is a deficient number, since it is larger than the sum of its proper divisors (771005188).

1012155212 is a wasteful number, since it uses less digits than its factorization.

1012155212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698400 (or 1698398 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1012155212 is about 31814.3868713511. The cubic root of 1012155212 is about 1004.0354307269.

Adding to 1012155212 its reverse (2125512101), we get a palindrome (3137667313).

The spelling of 1012155212 in words is "one billion, twelve million, one hundred fifty-five thousand, two hundred twelve".