100111211211212 has 24 divisors (see below), whose sum is σ = 175245181762560. Its totient is φ = 50041161219600.

The previous prime is 100111211211191. The next prime is 100111211211217. The reversal of 100111211211212 is 212112112111001.

It is a super-2 number, since 2×100111211211212² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100111211211217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212822489 + ... + 213292367.

It is an arithmetic number, because the mean of its divisors is an integer number (7301882573440).

Almost surely, 2^{100111211211212} is an apocalyptic number.

It is an amenable number.

100111211211212 is a deficient number, since it is larger than the sum of its proper divisors (75133970551348).

100111211211212 is a wasteful number, since it uses less digits than its factorization.

100111211211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485141 (or 485139 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 100111211211212 its reverse (212112112111001), we get a palindrome (312223323322213).

The spelling of 100111211211212 in words is "one hundred trillion, one hundred eleven billion, two hundred eleven million, two hundred eleven thousand, two hundred twelve".