212021123212 has 12 divisors (see below), whose sum is σ = 375507291096. Its totient is φ = 104733325760.

The previous prime is 212021123183. The next prime is 212021123219. The reversal of 212021123212 is 212321120212.

It is a self number, because there is not a number n which added to its sum of digits gives 212021123212.

It is not an unprimeable number, because it can be changed into a prime (212021123219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319308589 + ... + 319309252.

It is an arithmetic number, because the mean of its divisors is an integer number (31292274258).

Almost surely, 2^212021123212 is an apocalyptic number.

It is an amenable number.

212021123212 is a deficient number, since it is larger than the sum of its proper divisors (163486167884).

212021123212 is a wasteful number, since it uses less digits than its factorization.

212021123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638617928 (or 638617926 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212021123212 its reverse (212321120212), we get a palindrome (424342243424).

The spelling of 212021123212 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-three thousand, two hundred twelve".