2122111111212 has 18 divisors (see below), whose sum is σ = 5364225308988. Its totient is φ = 707370370392.

The previous prime is 2122111111181. The next prime is 2122111111229. The reversal of 2122111111212 is 2121111112212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

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 polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29473765398 + ... + 29473765469.

It is an arithmetic number, because the mean of its divisors is an integer number (298012517166).

Almost surely, 2^{2122111111212} is an apocalyptic number.

It is an amenable number.

2122111111212 is an abundant number, since it is smaller than the sum of its proper divisors (3242114197776).

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

2122111111212 is a wasteful number, since it uses less digits than its factorization.

2122111111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58947530877 (or 58947530872 counting only the distinct ones).

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

Adding to 2122111111212 its reverse (2121111112212), we get a palindrome (4243222223424).

The spelling of 2122111111212 in words is "two trillion, one hundred twenty-two billion, one hundred eleven million, one hundred eleven thousand, two hundred twelve".