12081020212 has 6 divisors (see below), whose sum is σ = 21141785378. Its totient is φ = 6040510104.

The previous prime is 12081020197. The next prime is 12081020219. The reversal of 12081020212 is 21202018021.

It can be written as a sum of positive squares in only one way, i.e., 11845274896 + 235745316 = 108836^2 + 15354^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12081020212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12081020219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1510127523 + ... + 1510127530.

Almost surely, 2^12081020212 is an apocalyptic number.

It is an amenable number.

12081020212 is a deficient number, since it is larger than the sum of its proper divisors (9060765166).

12081020212 is a wasteful number, since it uses less digits than its factorization.

12081020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020255057 (or 3020255055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12081020212 its reverse (21202018021), we get a palindrome (33283038233).

The spelling of 12081020212 in words is "twelve billion, eighty-one million, twenty thousand, two hundred twelve".