381211011212 has 12 divisors (see below), whose sum is σ = 676515316176. Its totient is φ = 187920920880.

The previous prime is 381211011197. The next prime is 381211011229. The reversal of 381211011212 is 212110112183.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671145863 + ... + 671146430.

It is an arithmetic number, because the mean of its divisors is an integer number (56376276348).

Almost surely, 2^381211011212 is an apocalyptic number.

It is an amenable number.

381211011212 is a deficient number, since it is larger than the sum of its proper divisors (295304304964).

381211011212 is a wasteful number, since it uses less digits than its factorization.

381211011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342292368 (or 1342292366 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 23.

Adding to 381211011212 its reverse (212110112183), we get a palindrome (593321123395).

The spelling of 381211011212 in words is "three hundred eighty-one billion, two hundred eleven million, eleven thousand, two hundred twelve".