221000210012 has 6 divisors (see below), whose sum is σ = 386750367528. Its totient is φ = 110500105004.

The previous prime is 221000209993. The next prime is 221000210029. The reversal of 221000210012 is 210012000122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221000209975 and 221000210002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27625026248 + ... + 27625026255.

It is an arithmetic number, because the mean of its divisors is an integer number (64458394588).

Almost surely, 2^221000210012 is an apocalyptic number.

It is an amenable number.

221000210012 is a deficient number, since it is larger than the sum of its proper divisors (165750157516).

221000210012 is a wasteful number, since it uses less digits than its factorization.

221000210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55250052507 (or 55250052505 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221000210012 its reverse (210012000122), we get a palindrome (431012210134).

The spelling of 221000210012 in words is "two hundred twenty-one billion, two hundred ten thousand, twelve".