221101011222 has 64 divisors (see below), whose sum is σ = 558958116864. Its totient is φ = 56736339840.

The previous prime is 221101011211. The next prime is 221101011227. The reversal of 221101011222 is 222110101122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101011227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5452054 + ... + 5492457.

It is an arithmetic number, because the mean of its divisors is an integer number (8733720576).

Almost surely, 2^221101011222 is an apocalyptic number.

221101011222 is an abundant number, since it is smaller than the sum of its proper divisors (337857105642).

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

221101011222 is a wasteful number, since it uses less digits than its factorization.

221101011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10944573.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221101011222 its reverse (222110101122), we get a palindrome (443211112344).

It can be divided in two parts, 22110101122 and 2, that multiplied together give a palindrome (44220202244).

The spelling of 221101011222 in words is "two hundred twenty-one billion, one hundred one million, eleven thousand, two hundred twenty-two".