221102201001220 has 48 divisors (see below), whose sum is σ = 578885762625408. Its totient is φ = 68914971740160.

The previous prime is 221102201001211. The next prime is 221102201001223. The reversal of 221102201001220 is 22100102201122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221102201001194 and 221102201001203.

It is not an unprimeable number, because it can be changed into a prime (221102201001223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71786427357 + ... + 71786430436.

It is an arithmetic number, because the mean of its divisors is an integer number (12060120054696).

Almost surely, 2^{221102201001220} is an apocalyptic number.

221102201001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221102201001220 is an abundant number, since it is smaller than the sum of its proper divisors (357783561624188).

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

221102201001220 is a wasteful number, since it uses less digits than its factorization.

221102201001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143572857820 (or 143572857818 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221102201001220 its reverse (22100102201122), we get a palindrome (243202303202342).

The spelling of 221102201001220 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred one million, one thousand, two hundred twenty".