100111212121222 has 16 divisors (see below), whose sum is σ = 152231130320832. Its totient is φ = 49367567171520.

The previous prime is 100111212121177. The next prime is 100111212121231. The reversal of 100111212121222 is 222121212111001.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 100111212121222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13203838 + ... + 19353649.

It is an arithmetic number, because the mean of its divisors is an integer number (9514445645052).

Almost surely, 2^{100111212121222} is an apocalyptic number.

100111212121222 is a deficient number, since it is larger than the sum of its proper divisors (52119918199610).

100111212121222 is a wasteful number, since it uses less digits than its factorization.

100111212121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32578623.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 100111212121222 its reverse (222121212111001), we get a palindrome (322232424232223).

The spelling of 100111212121222 in words is "one hundred trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twenty-two".