100011111212 has 24 divisors (see below), whose sum is σ = 175643076336. Its totient is φ = 49827552768.

The previous prime is 100011111181. The next prime is 100011111217. The reversal of 100011111212 is 212111110001.

It is a junction number, because it is equal to n+sod(n) for n = 100011111193 and 100011111202.

It is not an unprimeable number, because it can be changed into a prime (100011111217) 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, 2341883 + ... + 2384205.

It is an arithmetic number, because the mean of its divisors is an integer number (7318461514).

Almost surely, 2^100011111212 is an apocalyptic number.

It is an amenable number.

100011111212 is a deficient number, since it is larger than the sum of its proper divisors (75631965124).

100011111212 is a wasteful number, since it uses less digits than its factorization.

100011111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44417 (or 44415 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 100011111212 its reverse (212111110001), we get a palindrome (312122221213).

The spelling of 100011111212 in words is "one hundred billion, eleven million, one hundred eleven thousand, two hundred twelve".