100111212121203 has 24 divisors (see below), whose sum is σ = 155621286359136. Its totient is φ = 61785126086400.

The previous prime is 100111212121177. The next prime is 100111212121231. The reversal of 100111212121203 is 302121212111001.

It is a happy number.

It is not a de Polignac number, because 100111212121203 - 2⁸ = 100111212120947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100111212121253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5363282863 + ... + 5363301528.

It is an arithmetic number, because the mean of its divisors is an integer number (6484220264964).

Almost surely, 2^{100111212121203} is an apocalyptic number.

100111212121203 is a deficient number, since it is larger than the sum of its proper divisors (55510074237933).

100111212121203 is a wasteful number, since it uses less digits than its factorization.

100111212121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10726584475 (or 10726584472 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 100111212121203 its reverse (302121212111001), we get a palindrome (402232424232204).

The spelling of 100111212121203 in words is "one hundred trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, two hundred three".