101221221222 has 48 divisors (see below), whose sum is σ = 239453295120. Its totient is φ = 30647054400.

The previous prime is 101221221151. The next prime is 101221221307. The reversal of 101221221222 is 222122122101.

It is a happy number.

101221221222 is a `hidden beast` number, since 1 + 0 + 1 + 221 + 221 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 101221221195 and 101221221204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17404 + ... + 450272.

It is an arithmetic number, because the mean of its divisors is an integer number (4988610315).

Almost surely, 2^101221221222 is an apocalyptic number.

101221221222 is an abundant number, since it is smaller than the sum of its proper divisors (138232073898).

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

101221221222 is a wasteful number, since it uses less digits than its factorization.

101221221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434069 (or 434066 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 101221221222 its reverse (222122122101), we get a palindrome (323343343323).

The spelling of 101221221222 in words is "one hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".