221130001212 has 24 divisors (see below), whose sum is σ = 516002860800. Its totient is φ = 73705306416.

The previous prime is 221130001199. The next prime is 221130001243. The reversal of 221130001212 is 212100031122.

It is a junction number, because it is equal to n+sod(n) for n = 221130001191 and 221130001200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387762 + ... + 769817.

It is an arithmetic number, because the mean of its divisors is an integer number (21500119200).

Almost surely, 2^221130001212 is an apocalyptic number.

It is an amenable number.

221130001212 is an abundant number, since it is smaller than the sum of its proper divisors (294872859588).

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

221130001212 is a wasteful number, since it uses less digits than its factorization.

221130001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173505 (or 1173503 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 221130001212 its reverse (212100031122), we get a palindrome (433230032334).

The spelling of 221130001212 in words is "two hundred twenty-one billion, one hundred thirty million, one thousand, two hundred twelve".