100321221222 has 32 divisors (see below), whose sum is σ = 222946560000. Its totient is φ = 33438830184.

The previous prime is 100321221211. The next prime is 100321221223. The reversal of 100321221222 is 222122123001.

100321221222 is a `hidden beast` number, since 100 + 321 + 2 + 21 + 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 = 100321221195 and 100321221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100321221223) 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, 1918143 + ... + 1969749.

It is an arithmetic number, because the mean of its divisors is an integer number (6967080000).

Almost surely, 2^100321221222 is an apocalyptic number.

100321221222 is an abundant number, since it is smaller than the sum of its proper divisors (122625338778).

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

100321221222 is a wasteful number, since it uses less digits than its factorization.

100321221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87617 (or 87611 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 100321221222 its reverse (222122123001), we get a palindrome (322443344223).

The spelling of 100321221222 in words is "one hundred billion, three hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".