221012220012 has 48 divisors (see below), whose sum is σ = 532536883200. Its totient is φ = 71266625280.

The previous prime is 221012219983. The next prime is 221012220061. The reversal of 221012220012 is 210022210122.

It is a junction number, because it is equal to n+sod(n) for n = 221012219973 and 221012220000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 856689 + ... + 1084407.

It is an arithmetic number, because the mean of its divisors is an integer number (11094518400).

Almost surely, 2^221012220012 is an apocalyptic number.

It is an amenable number.

221012220012 is an abundant number, since it is smaller than the sum of its proper divisors (311524663188).

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

221012220012 is a wasteful number, since it uses less digits than its factorization.

221012220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230366 (or 230364 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221012220012 its reverse (210022210122), we get a palindrome (431034430134).

The spelling of 221012220012 in words is "two hundred twenty-one billion, twelve million, two hundred twenty thousand, twelve".