2111221111212 has 36 divisors (see below), whose sum is σ = 5349079977696. Its totient is φ = 702107556960.

The previous prime is 2111221111201. The next prime is 2111221111231. The reversal of 2111221111212 is 2121111221112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68018163 + ... + 68049194.

It is an arithmetic number, because the mean of its divisors is an integer number (148585554936).

Almost surely, 2^{2111221111212} is an apocalyptic number.

It is an amenable number.

2111221111212 is an abundant number, since it is smaller than the sum of its proper divisors (3237858866484).

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

2111221111212 is a wasteful number, since it uses less digits than its factorization.

2111221111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136067798 (or 136067793 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

Adding to 2111221111212 its reverse (2121111221112), we get a palindrome (4232332332324).

The spelling of 2111221111212 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twelve".