1011211111212 has 24 divisors (see below), whose sum is σ = 2382400290816. Its totient is φ = 333797842128.

The previous prime is 1011211111187. The next prime is 1011211111217. The reversal of 1011211111212 is 2121111121101.

It is a super-2 number, since 2×1011211111212² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1011211111191 and 1011211111200.

It is not an unprimeable number, because it can be changed into a prime (1011211111217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409064748 + ... + 409067219.

It is an arithmetic number, because the mean of its divisors is an integer number (99266678784).

Almost surely, 2^{1011211111212} is an apocalyptic number.

1011211111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1011211111212 is an abundant number, since it is smaller than the sum of its proper divisors (1371189179604).

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

1011211111212 is a wasteful number, since it uses less digits than its factorization.

1011211111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818132077 (or 818132075 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1011211111212 its reverse (2121111121101), we get a palindrome (3132322232313).

The spelling of 1011211111212 in words is "one trillion, eleven billion, two hundred eleven million, one hundred eleven thousand, two hundred twelve".