221100033012 has 96 divisors (see below), whose sum is σ = 538306642944. Its totient is φ = 70574918400.

The previous prime is 221100032983. The next prime is 221100033041. The reversal of 221100033012 is 210330001122.

It is an interprime number because it is at equal distance from previous prime (221100032983) and next prime (221100033041).

It is a junction number, because it is equal to n+sod(n) for n = 221100032982 and 221100033000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7915623 + ... + 7943505.

It is an arithmetic number, because the mean of its divisors is an integer number (5607360864).

Almost surely, 2^221100033012 is an apocalyptic number.

It is an amenable number.

221100033012 is an abundant number, since it is smaller than the sum of its proper divisors (317206609932).

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

221100033012 is a wasteful number, since it uses less digits than its factorization.

221100033012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28229 (or 28227 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 221100033012 its reverse (210330001122), we get a palindrome (431430034134).

The spelling of 221100033012 in words is "two hundred twenty-one billion, one hundred million, thirty-three thousand, twelve".