1211000122112 has 108 divisors (see below), whose sum is σ = 2661565374888. Its totient is φ = 549508608000.

The previous prime is 1211000122099. The next prime is 1211000122121. The reversal of 1211000122112 is 2112210001121.

It is a super-2 number, since 2×1211000122112² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18149612 + ... + 18216212.

Almost surely, 2^{1211000122112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211000122112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330782687444).

1211000122112 is an abundant number, since it is smaller than the sum of its proper divisors (1450565252776).

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

1211000122112 is an equidigital number, since it uses as much as digits as its factorization.

1211000122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67226 (or 67201 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211000122112 its reverse (2112210001121), we get a palindrome (3323210123233).

The spelling of 1211000122112 in words is "one trillion, two hundred eleven billion, one hundred twenty-two thousand, one hundred twelve".