111212000010 has 48 divisors (see below), whose sum is σ = 296966106216. Its totient is φ = 28855004544.

The previous prime is 111211999991. The next prime is 111212000023. The reversal of 111212000010 is 10000212111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 93674559969 + 17537440041 = 306063^2 + 132429^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 111211999956 and 111212000001.

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, 16695169 + ... + 16701828.

Almost surely, 2^111212000010 is an apocalyptic number.

111212000010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111212000010 is an abundant number, since it is smaller than the sum of its proper divisors (185754106206).

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

111212000010 is a wasteful number, since it uses less digits than its factorization.

111212000010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33397047 (or 33397044 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111212000010 its reverse (10000212111), we get a palindrome (121212212121).

The spelling of 111212000010 in words is "one hundred eleven billion, two hundred twelve million, ten", and thus it is an aban number.