221020000012 has 24 divisors (see below), whose sum is σ = 442292260256. Its totient is φ = 94668801408.

The previous prime is 221019999979. The next prime is 221020000013. The reversal of 221020000012 is 210000020122.

It is not an unprimeable number, because it can be changed into a prime (221020000013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2202363 + ... + 2300530.

Almost surely, 2^221020000012 is an apocalyptic number.

It is an amenable number.

221020000012 is an abundant number, since it is smaller than the sum of its proper divisors (221272260244).

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

221020000012 is a wasteful number, since it uses less digits than its factorization.

221020000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504657 (or 4504655 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 221020000012 its reverse (210000020122), we get a palindrome (431020020134).

The spelling of 221020000012 in words is "two hundred twenty-one billion, twenty million, twelve", and thus it is an aban number.