100001121222 has 48 divisors (see below), whose sum is σ = 209038777920. Its totient is φ = 31882933152.

The previous prime is 100001121191. The next prime is 100001121239. The reversal of 100001121222 is 222121100001.

It is a junction number, because it is equal to n+sod(n) for n = 100001121198 and 100001121207.

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, 381453 + ... + 587799.

It is an arithmetic number, because the mean of its divisors is an integer number (4354974540).

Almost surely, 2^100001121222 is an apocalyptic number.

100001121222 is an abundant number, since it is smaller than the sum of its proper divisors (109037656698).

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

100001121222 is a wasteful number, since it uses less digits than its factorization.

100001121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206485 (or 206448 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100001121222 its reverse (222121100001), we get a palindrome (322122221223).

The spelling of 100001121222 in words is "one hundred billion, one million, one hundred twenty-one thousand, two hundred twenty-two".