2212120111212 has 72 divisors (see below), whose sum is σ = 6109318090512. Its totient is φ = 669325219200.

The previous prime is 2212120111189. The next prime is 2212120111231. The reversal of 2212120111212 is 2121110212122.

2212120111212 is a `hidden beast` number, since 221 + 2 + 120 + 111 + 212 = 666.

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

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, 3963783 + ... + 4487294.

It is an arithmetic number, because the mean of its divisors is an integer number (84851640146).

Almost surely, 2^{2212120111212} is an apocalyptic number.

2212120111212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2212120111212 is an abundant number, since it is smaller than the sum of its proper divisors (3897197979300).

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

2212120111212 is a wasteful number, since it uses less digits than its factorization.

2212120111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8451759 (or 8451754 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2212120111212 its reverse (2121110212122), we get a palindrome (4333230323334).

The spelling of 2212120111212 in words is "two trillion, two hundred twelve billion, one hundred twenty million, one hundred eleven thousand, two hundred twelve".