221012211210012 has 72 divisors (see below), whose sum is σ = 574332012836400. Its totient is φ = 71609292511488.

The previous prime is 221012211210001. The next prime is 221012211210029. The reversal of 221012211210012 is 210012112210122.

221012211210012 is a `hidden beast` number, since 221 + 0 + 1 + 221 + 1 + 210 + 0 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80058337 + ... + 82772952.

Almost surely, 2^{221012211210012} is an apocalyptic number.

It is an amenable number.

221012211210012 is an abundant number, since it is smaller than the sum of its proper divisors (353319801626388).

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

221012211210012 is a wasteful number, since it uses less digits than its factorization.

221012211210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162832355 (or 162832350 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221012211210012 its reverse (210012112210122), we get a palindrome (431024323420134).

The spelling of 221012211210012 in words is "two hundred twenty-one trillion, twelve billion, two hundred eleven million, two hundred ten thousand, twelve".