11212121212122 has 32 divisors (see below), whose sum is σ = 22452498432000. Its totient is φ = 3732664865328.

The previous prime is 11212121212121. The next prime is 11212121212169. The reversal of 11212121212122 is 22121212121211.

It is a super-2 number, since 2×11212121212122² (a number of 27 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (11212121212121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125091879 + ... + 125181477.

It is an arithmetic number, because the mean of its divisors is an integer number (701640576000).

Almost surely, 2^{11212121212122} is an apocalyptic number.

11212121212122 is an abundant number, since it is smaller than the sum of its proper divisors (11240377219878).

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

11212121212122 is a wasteful number, since it uses less digits than its factorization.

11212121212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115650.

The product of its digits is 128, while the sum is 21.

Adding to 11212121212122 its reverse (22121212121211), we get a palindrome (33333333333333).

The spelling of 11212121212122 in words is "eleven trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty-two".